AU2003255217A1 - Inhibitors of Caspases - Google Patents

Description

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name of Applicant: Address for Service: Invention Title: Details of Original Application: Vertex Pharmaceuticals Incorporated CULLEN CO.

Level 26 239 George Street Brisbane Qld 4000 Inhibitors of Caspases No. 30986/99 The following statement is a full description of this invention, including the best method of performing it, known to us: -la- INHIBITORS OF CASPASES TECHNICAL FIELD OF THE INVENTION The present invention relates to novel classes of compounds which are caspase inhibitors, in particular interleukin-lp converting enzyme ("ICE") inhibitors. This invention also relates to pharmaceutical compositions comprising these compounds.

The compounds and pharmaceutical compositions of this invention are particularly well suited for inhibiting caspase activity and consequently, may be advantageously used as agents against interleukin-lapoptosis-, interferon-y inducing factor- (IGIF), or interferon-y- mediated diseases, including inflammatory diseases, autoimmune diseases, destructive bone disorders, proliferative disorders, infectious diseases, and degenerative diseases. This invention also relates to methods for inhibiting caspase activity and decreasing IGIF production and IFN-y production and methods for treating interleukin- 1, apoptosis-, and interferon-y- mediated diseases using the compounds and compositions of this invention. This invention also relates to methods of preparing the compounds of this invention.

BACKGROUND OF THE INVENTION Interleukin 1 is a major proinflammatory and inmmunoregulatory protein that stimulates fibroblast differentiation and proliferation, the production of prostaglandins, 2 collagenase and phospholipase by synovial cells and chondrocytes, basophil and eosinophil degranulation and neutrophil activation. Oppenheim, J.H. et al, Immunology Today, 7, pp. 45-56 (1986). As such, it is involved in the pathogenesis of chronic and acute inflammatory and autoimmune diseases. For example, in rheumatoid arthritis, IL- is both a mediator of inflammatory symptoms and of the destruction of the cartilage proteoglycan in afflicted joints. Wood, D.D.

et al., Arthritis Rheum. 26, 975, (1983); Pettipher, E.J. et al., Proc. Natl. Acad. Sci. USA 71, 295 (1986); Arend, W.P. and Dayer, Arthritis Rheum. 38, 151 (1995). IL-1 is also a highly potent bone resorption agent. Jandiski, J. Oral Path 17, 145 (1988); Dewhirst, F.E. et al., J. Immunol. 8, 2562 1985). It is alternately referred to as "osteoclast activating factor" in destructive bone diseases such as osteoarthritis and multiple myeloma. Bataille, R. et al., Int. J. Clin. Lab. Res. 21(4), 283 (1992). In certain proliferative disorders, such as acute myelogenous leukemia and multiple myeloma, IL-l can promote tumor cell growth and adhesion. Bani, J.

Natl. Cancer Inst. 83, 123 (1991); Vidal-Vanaclocha, Cancer Res. 54, 2667 (1994). In these disorders, IL-I also stimulates production of other cytokines such as IL-6, which can modulate tumor development (Tartour et al., Cancer Res. 54, p. 6243 (1994). IL-1 is predominantly produced by peripheral blood monocytes as part of the inflammatory response and exists in two distinct agonist forms, IL-la and IL-1P. Mosely, B.S.

et al., Proc. Nat. Acad. Sci., 84, pp. 4572-4576 (1987); Lonnemann, G. et al., Eur. J. Immunol., 19, pp.

1531-1536 (1989) IL-1P is synthesized as a biologically inactive precursor, pIL-1 pL-10 lacks a 3 conventional leader sequence and is not processed by a signal peptidase. March, Nature, 315, pp.641-647 (1985). Instead, pIL-lp is cleaved by interleukin-lp converting enzyme between Asp-116 and Ala-117 to produce the biologically active C-terminal fragment found in human serum and synovial fluid. Sleath, P.R., et al., J. Biol. Chem., 265, pp.14526-14528 (1992); A.D. Howard et al., J. Immunol., 147, pp.2964-2969 (1991). ICE is a cysteine protease localized primarily in monocytes. It converts precursor IL-lp to the mature form. Black, R.A. et al., FEBS Lett., 247, pp.- 386-390 (1989); Kostura, M.J. et al., Proc. Natl. Acad.

Sci. 86, pp.5227-5231 (1989). Processing by ICE is also necessary for the transport of mature IL-1P through the cell membrane.

ICE (or caspase-l) is a member of a family of homologous enzymes called caspases. These homologs have sequence similarities in the active site regions of the enzymes. Such homologs (caspases) include TX (or ICErel-_I or ICH-2) (caspase-4) (Faucheu, et al., EMBO 14, p. 1914 (1995); Kamens et al., J.

Biol. Chem., 270, p. 15250 (1995); Nicholson et al., J.

Biol. Chem., 270 15870 (1995)), TY (or ICErel-III) (Nicholson et al., J. Biol. Chem., 270, p.

15870 (1995); ICH-1 (or Nedd-2) (caspase-2) (Wang, L.

et al., Cell, 78, p. 739 (1994)), MCH-2 (caspase-6), (Fernandes-Alnemri, T. et al., Cancer Res., 55, p. 2737 (1995), CPP32 (or YAMA or apopain) (caspase-3) (Fernandes-Alnemri, T. et al., J. Biol. Chem., 269, p.

30761 (1994); Nicholson, D.W. et al., Nature, 376, p.

37 (1995) CMH-1 (or MCH-3) (caspase-7) (Lippke, et ai., J. Biol. Chem., 271(4), p1825-1828 (1996)); Fernandes-Alnemri, T. et al., Cancer Res., (1995) tcaspase-8B (Muzio, M. et.al., Cell 85(6), 817- 827, (1996)), MCH-6 (caspase-9) (Duan, H. et.al., J.

4 Biol. Chem., 271(34), p. 16720-16724 (1996)), Mch4 (Vincenz, C. et.al., J. Biol. Chem., 272, p. 6578-6583 (1997); Fernandes-Alnemri, T. et.al., Proc. Natl. Acad. Sci. 93, p. 7464-7469 (1996)), Ich-3 (caspase-11) (Wang, S. et.al., J. Biol. Chem., 271, p.

20580-20587 (1996)), mCASP-12 (caspase-12), (Van de Craen, M. et.al., FEBS Lett. 403, p. 61-69 (1997); Yuan, Y.and Miura, M. PCT Publication W095/00160 (1995)), ERICE (caspase-13), (Humke, et.al., J.

Biol. Chem., 273(25) p. 15702-15707 (1998)), and MICE (caspase-14) (Hu, S. et.al., J. Biol. Chem., 273(45) p.

29648-29653 (1998)).

Each of these ICE homologs, as well as ICE itself, is capable of inducing apoptosis when overexpressed in transfected cell lines. Inhibition of one or more of these homologs with the peptidyl ICE inhibitor Tyr-Val-Ala-Asp-chloromethylketone results in inhibition of apoptosis in primary cells or cell lines.

Lazebnik et al., Nature, 371, p. 346.(1994).

Caspases also appear to be involved in the regulation of programmed cell death or apoptosis.

Yuan, J. et al., Cell, 75, pp.

641 652 (1993); Miura, M.

et al., Cell, 75, pp. 653-660 (1993); Nett-Fiordalisi, M.A. et al., J. Cell Biochem., 17B, p. 117 (1993). In particular, ICE or ICE homologs are thought to be associated with the regulation of apoptosis in neurodegenerative diseases, such as Alzheimer's and Parkinson's disease. Marx, J. and M. Baringa, Science, 259, pp. 760-762 (1993); Gagliardini, V. et al., Science, 263, pp. 826-828 (1994). Therapeutic applications for inhibition of apoptosis may include treatment of Alzheimer's disease, Parkinson's disease, stroke, myocardial infarction, spinal atrophy, and aging.

ICE has been demonstrated to mediate apoptosis (programmed cell death) in certain tissue types. Steller, Science, 267, p. 1445 (1995); Whyte, M. and Evan, Nature, 376, p. 17 (1995); Martin, S.J. and Green, Cell, 82, p. 349 (1995); Alnemri, et al., J. Biol. Chem., 270, p. 4312 (1995); Yuan, J. Curr. Opin. Cell Biol., 7, p. 211 (1995). A transgenic mouse with a disruption of the ICE gene is deficient in Fas-mediated apoptosis (Kuida, K. et al., Science 267, 2000 (1995)). This activity of ICE is distinct from its role as the processing enzyme for pro-IL-1p. It is conceivable that in certain tissue types, inhibition of ICE may not affect secretion of mature IL-l1, but may inhibit apoptosis.

Enzymatically active ICE has been previously described as a heterodimer composed of two subunits, and pl0 (20kDa and 10kDa molecular weight, respectively). These subunits are derived from a proenzyme (p45) by way of a p30 form, through an activation mechanism that is autocatalytic.

Thornberry, N.A. et al., Nature, 356, pp.768-774 (1992). The ICE proenzyme has been divided into several functional domains: a prodomain (p14), a p22/20 subunit, a polypeptide linker and a pl subunit.

Thornberry et al., supra; Casano et al., Genomics, pp. 474-481 (1994).

Full length p45 has been characterized by its cDNA and amino acid sequences. PCT patent applications WO 91/15577 and WO 94/00154. The p20 and pl0 cDNA and amino acid sequences are also known. Thornberry et al., supra. Murine and rat ICE have also been sequenced and cloned. They have high amino acid and nucleic acid seauence homology to human ICE. Miller, D.K. et al., Ann. N.Y. Acad. Sci., 696, pp. 133-148 (1993); Molineaux, S.M. et al., Proc. Nat. Acad. Sci., 90, pp.

6 1809-1813 (1993). The three-dimensional structure of ICE has been determined at atomic resolution by X-ray crystallography. Wilson, et al., Nature, 370, pp. 270-275 (1994). The active enzyme exists as a tetramer of two p20 and two pl0 subunits.

Recently, ICE and other members of the ICE/CED-3 family have been linked to the conversion of pro-IGIF to IGIF or to the production of IFN-y in vivo (PCT application PCT/US96/20843, publication no. WO 97/22619, which is incorporated herein by reference) IGIF is synthesized in vivo as the precursor protein "pro-IGIF".

Interferon-gamma inducing factor (IGIF) is an approximately 18-kDa polypeptide that stimulates T-cell production of interferon-gamma (IFN- IGIF is produced by activated Kupffer cells and macrophages in vivo and is exported out of such cells upon endotoxin stimulation. Thus, a compound that decreases IGIF production would be useful as an inhibitor of such Tcell stimulation which in turn would reduce the levels of IFN-y production by those cells.

IFN-y is a cytokine with immunomodulatory effects on a variety of immune cells. In particular, IFN-y is involved in macrophage activation and Thi cell selection Belardelli, APMIS, 103, p. 161 (1995)).

IFN-y exerts its effects in part by modulating the expression of genes through the STAT and IRF pathways Schindler and J.E. Darnell, Ann. Rev. Biochem., 64, p. 621 (1995); T. Taniguchi, J. Cancer Res. Clin.

Oncol., 121, p. 516 (1995)).

Mice lacking IFN-y or its receptor have multiple defects in immune cell function and are resistant to endotoxic shock Huang et al., Science, 259, p.1742 (1993); D. Dalton et al., Science, 259, p.- 1739 (1993); B.D. Car et al., J. Exp. Med., 179, p.1437 -7 (1994)). Along with IL-12, IGIF appears to be a potent inducer of IFN-y production by T cells Okamura et al., Infection and Immunity, 63, p.3966 (1995); H.

Okamura et al., Nature, 378, p.88 (1995); S. Ushio et al., J.Immuncl., 156, p.4274 (1996)).

IFN-y has been shown to contribute to the pathology associated with a variety of inflammatory, infectious and autoimmune disorders and diseases.

Thus, compounds capable of decreasing IFN-y production would be useful to ameliorate the effects of IFN-y related pathologies.

Accordingly, compositions and methods capable of regulating the conversion of pro-IGIF to IGIF would be useful for decreasing IGIF and IFN-y production in vivo, and thus for ameliorating the detrimental effects of these proteins which contribute to human disorders and diseases.

Caspase inhibitors represent a class of compounds useful for the control of inflammation or apoptosis or both. Peptide and peptidyl inhibitors of ICE have been described (PCT patent applications WO 91/15577, WO 93/05071, WO 93/09135, WO 93/12076, WO 93/14777, WO 93/16710, WO 95/35308, WO 96/30395, WO 96/33209 and WO 98/01133; European patent applications 503 561, 547 699, 618 223, 623 592, and 623 606; and US patent nos. 5,434,248, 5,710,153, 5,716,929, and 5,744,451). Such peptidyl inhibitors of ICE have been observed to block the production of mature IL-1P in a mouse model of inflammation (vide infra) and to suppress growth of leukemia cells in vitro (Estrov et al., Blood, 84, 380a (1994)).

However, due to their peptidic nature, such inhibitors are typically characterized by undesirable pharmacologic properties, such as poor cellular penetration and cellular activity, poor oral -8absorption, instability and rapid metabolism.

Plattner, J.J. and D.W. Norbeck, in Drug Discovery Technologies, C.R. Clark and W.H. Moos, Eds. (Ellis Horwood, Chichester, England, 1990), pp.92-126. These S properties has hampered their development into effective drugs.

Non-peptidyl compounds have also been reported to inhibit ICE in vitro. PCT patent application WO 95/26958; US Patent 5,552,400; Dolle et al. J. Med. Chem. 39, pp. 2438-2440 (1996).

It is not clear however whether these compounds have the appropriate pharmacological profiles to be therapeutically useful.

Accordingly, the need exists for compounds that can effectively inhibit caspases, and that have favorable in vivo activity, for use as agents for preventing and treating chronic and acute forms of ILapoptosis-, IGIF-, or IFN-y-mediated diseases, as well as inflammatory, autoimmune, destructive bone, proliferative, infectious, or degenerative diseases.

SUMMARY OF THE INVENTION The present invention provides novel classes of compounds, and pharmaceutically acceptable derivatives thereof, that are useful as caspase inhibitors, in particular, as ICE inhibitors. These compounds can be used alone or in combination with other therapeutic or prophylactic agents, such as antibiotics, immunomodulators or other antiinflammatory agents, for the treatment or prophylaxis of diseases mediated by IL-I, apoptosis, IGIF, or IFN- According to a preferred embodiment, the compounds of this invention are capable of binding to the active site of a caspase and inhibiting the activity of that enzyme.

9 It is a principal object of this invention to provide novel classes of compounds represented by formula I, which have favorable in viva profiles: R2 R6 R X N R

R

4

O

wherein the various substituents are described herein.

It is a further objective of this invention to provide pharmaceutical compositions, including multi-component compositions. This invention also provides methods for using and preparing the compounds of this invention and related compounds.

DETAILED DESCRIPTION OF THE INVENTION In order that the invention described herein may be more fully understood, the following detailed description is set forth.

The following abbreviations and definitions are used throughout the application.

Abbreviations acetic anhydride MeCN acetonitrile AMC aminomethyl coumarin n-Bu normal-butyl DMF dimethylformamide

I

DIEA N, N-diisopropylethylamine i DMA N,N-dimethylacetamide EDC 1-(3-Dimethylaminopropyl)-3ethylcarbodiimide hydrochloride Et 2 0 diethyl ether 10 EtOAc I ethyl acetate Fmoc 9-fluorenylmethyoxycarbonyl HBTU O-benzotriazol-l-yl-N,N,NN' tetramethyluronium hexafluorophosphate HOBT 1-hydroxybenzotriazole hydrate MeOH methanol NMP N-methylpyrrolidinone TFA trifluoroacetic acid pNA i p-nitroaniline The term "caspase" refers to an enzyme that is a member of the family of enzymes that includes ICE (see H. Hara, Natl. Acad. Sci., 94, pp. 2007-2012 (1997)).

The terms "HBV", "HCV" and "HGV" refer to hepatitis-B virus, hepatitis-C virus and hepatitis-G virus, respectively.

The term "Ki" refers to a numerical measure of the effectiveness of a compound in inhibiting the activity of a target enzyme such as ICE. Lower values of Ki reflect higher effectiveness. The Ki value is a derived by fitting experimentally determined rate data to standard enzyme kinetic equations (see I.H. Segel, Enzyme Kinetics, Wiley-Interscience, 1975).

The term "interferon gamma inducing factor" or "IGIF" refers to a factor which is capable of stimulating the endogenous production of IFN-y.

The term "caspase inhibitor" refer to a compound which is capable of demonstrating detectable inhibition of one or more caspases. The term "ICE inhibitor" refers to a compound which is capable of demonstrating detectable inhibition of ICE and optionally one or more additional caspases. Inhibition of these enzymes may be determined using the methods described and incorporated by reference herein.

The skilled practitioner realizes that an in vivo enzyme inhibitor is not necessarily an in vitro 11 enzyme inhibitor. For example, a prodrug form of a compound typically demonstrates little or no activity in in vitro assays. Such prodrug forms may be altered by metabolic or other biochemical processes in the patient to provide an in vivo ICE inhibitor.

The term "cytokine" refers to a molecule which mediates interactions between cells.

The term "condition" refers to any disease, disorder or effect that produces deleterious biological consequences in a subject.

The term "subject" refers to an animal, or to one or more cells derived from an animal. Preferably, the animal is a mammal, most preferably a human. Cells may be in any form, including but not limited to cells retained in tissue, cell clusters, immortalized cells, transfected or transformed cells, and cells derived from an animal that have been physically or phenotypically altered.

The term "patient" as used in this application refers to any mammal, preferably humans.

The term "alkyl" refers to a straight-chained or branched, saturated aliphatic hydrocarbon containing 1 to 6 carbon atoms.

The term "alkenyl" refers to a straightchained or branched unsaturated hydrocarbon containing 2 to 6 carbon atoms and at least one double bond.

The term "alkynyl" refers to a straightchained or branched unsaturated hydrocarbon containing 2 to 6 carbon atoms and at least one triple bond.

The term "cycloalkyl" refers to a mono- or polycyclic, non-aromatic, hydrocarbon ring system which may optionally contain unsaturated bonds in the ring system. Examples include cyclohexyl, adamantyl.

norbornyl, and spirocyclopentyl.

12 The term "aryl" refers to a mono- or polycyclic ring system which contains 6. 10, 12 or 14 carbons in which at least one ring of the ring system is aromatic. The aryl groups of this invention are optionally singly or multiply substituted with R 11 Examples of aryl ring systems include, phenyl, naphthyl, and terrahydronaphthyl.

The term "heteroa.ryl" refers to a mono- or polycyclic ring system which contains I to 15 carbon atoms and 1 to 4 heceroatoms, and in which at least one ring of the ring system is aromatic. Heteroatoms are sulfur, nitrogen or oxygen. The heteroaryl groups of this invention are optionally singly or multiply substituted with R 11 The term "heterocyclic" refers to a mono- or polycyclic ring system which contains I to 15 carbon atoms and 1 to 4 heteroaros, in which the mono- or polycyclic ring system may optionally contain unsaturated bonds but is not aromatic. Heteroatoms are independently sulfur, nitrogen, or oxygen.

The term "alkylaryl" refers to an alkyl group, wherein a hydrogen atom of the alkyl group is replaced by an aryl radical.

The term "alKylheceroaryl" refers to an alkyl group, wherein a hydrogen atom of the alkyl group is replaced by a heteroaryl radical.

The term 'amino acid side chain" refers to any group attached to the o carbon of a naturally or non-naturally occurring amino acid.

The term "substitute" refers to the replacement of a hydrogen atom in a compound with a substituent group.

The term "straight chain" refers to a contiguous unbranching string of covalently bound atoms. The straight chain may be substituted, but 13 these substituents are not a part of the straight chain.

In chemical formulas, parenthesis are used herein to denote connectivity in molecules or groups.

In particular, parentheses are used to indicate: 1) that more than one atom or group is bonded to a particular atom; or 2) a branching point the atom immediately before the open parenthesis is bonded both to the atom or group in the parentheses and the atom or group immediately after the closed parenthesis). An example of the first use is "-N(alkyl) 2 indicating two alkyl groups bond to an N atom. An example of the second use is "-C(O)NH2", indicating a carbonyl group and an amino ("NH 2 group both bonded to the indicated carbon atom. A "-C(O)NH 2 group may be represented in other ways, including the following structure: 0 i NH 2 Substituents may be represented in various forms. These various forms are known to the skilled practitioner and may be used interchangeably. For example, a methyl substituent on a phenyl ring may be represented in any of the following forms:

"H

CY H ,F a Me O c Various forms of substituents such as methyl are used herein interchangeably.

3C Other definitions are set forth in the specification where necessary.

-14- Compounds of this Invention The compounds of one embodiment A of this invention are those of formula 1: R 2

RR

N

R 4 0 wherein: Y is: (a)

H

0 provided that when R 7 is -ON then Y can also be: (b) 0 Mr 0 HO H X is -C(R or m is 0 or 1; R1 is H, -C(O)R 8

-C(O)C(O)R

8 -S(0 2R 8 -S(0)R 8 3, -C(C)OR 8 -C (0)N(H)R 8 -S (O)2N(N) -R 8 -S -R 8

(O)N(H)R

8 -C (O)CH=CHR 8

-C(O)CH

2

OR

8

-C(O)CH

2 N(i)R 8 -C(0)N(R 8 2 -S (O) 2 N(R8l 2 15 -S(O)N(R8)2, -C(O)C(O)N(R 8 2

-C(O)CH

2

N(R

8 2

-CH

2

R

8

-CH

2 -alkenyl-R 8 or -CH 2 -alkynyl-R 8

R

2 is -H and each R 3 is independently an amino acid side chain, -R 8 alkenyl-R 9 or alkynyl-R 9 or R 2 and one R 3 together with the atoms to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R 1 1 a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -R 1

R

4 is -H and each R 5 is independently an amino acid side chain, -R 8 -alkenyl-R 9 or -alkynyl-

R

9 or R 4 and one R 5 together with the atoms to which they are bound form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 1 0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1

R

6 is -H;

R

7 is -OH, -OR 8 or -N(H)OH; each R 8 is independently -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, 16 wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 each R 9 is independently -aryl, -heteroaryl, cycloalkyl, or -heterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 each R 1 0 is independently -OH, -SH, -Cl, -Br, -N02, -CN, -NH2, -CO2H, -C(O)NH2, -N(H)C(O)H, -N(H)C(O)NH2, -perfluoroalkyl, -0-alkyl, -O-aryl, -0-alkylaryl, -N(H)alkyl, -N(H)aryl, -N(H)-alkylaryl, -N(alkyl)2, -C(O)N(H)alkyl, -C(O)N(alkyl)2, -N(H)C(O)alkyl, -N(H)C(O)N(H)alkyl, -N(H)C(O)N(alkyl)2, -S-alkyl, -S-aryl, -S-alkylaryl, -S(0)2alkyl, -S(0)alkyl, -C(0)alkyl, -CH2NH2, -CH2N(H)alkyl, or -CH2N(alkyl)2, -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, wherein a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by

R

1 and each R 1 1 is independently -OH, -SH, -Cl, -Br, -N02, -CN, -NH2, -CO2H, -C(O)NH2, -N(H)C(O)H, -N(H)C(O)NH2, -alkyl, -cycloalkyl, -perfluoroalkyl, -0alkyl, -0-aryl, -O-alkylaryl, -N(H)alkyl, -N(F)aryl, 17 -N(H)-alkylaryl, -N(alkyl)2, -C(O)N(H)alkyl, -C(O)N(alkyl) 2 -N(H)C(O)alkyl, -N(H)C(O)N(H)alkyl, -N(H)C(0)N(alkyl)2, -S-alkyl, -S-aryl, -S-alkylaryl, -S(0)2alkyl, -S(O)alkyl, -C(O)alkyl, -CH2NH 2 -CH2N(H)alkyl, or -CH2N(alkyl) 2 In an alternative form of embodiment A:

R

1 is H, -R 8

-C(O)R

8

-C(O)C(O)R

8 -S(0)2R 8

-S(O)R

8

-C(O)OR

8

-C(O)N(H)R

8 -S(O)2N(H)-R 8

-S(O)N(H)-R

8 -C(0)C(0)N(H)R 8

-C(O)CH=CHR

8 8 -C(0)CH 2

N(H)R

8

-C(O)N(R

8 2 -S(0)2N(R 8 2

-S(O)N(R

8 2

-C(O)C(O)N(R

8 2

-C(O)CH

2

N(R

8

-CH

2

R

8

-CH

2 -alkenyl-R 8 or -CH 2 -alkynyl-R 8

R

2 is -H and each R 3 is independently an amino acid side chain, -R 8 alkenyl-R 9 or alkynyl-R 9 or each R 3 together with the atom to which they are bound, form a 3 to 7 membered cyclic or heterocyclic cyclic ring system, or R 2 and one R 3 together with the atoms to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R I0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R 1 1 a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -R 1 each R 1 0 is 'independently -OH, -SH, -Cl, -Br, -N02, -CN, -NH2, -CO2H, -C(O)NH 2

-N(H)C(O)H,

-N(H)C(O)NH2, -perfluoroalkyl, -0-alkyl, -O-aryl, -O-alkylaryl, -N(H)alkyl, -N(H)aryl, -N(H)-alkylaryl, -N(alkyl)2, -C(0)N(H)alkyl, -C(0)N(alkyl)2, -N(H)C(O)alkyl, -N(H)C(O)Oalkyl, -N(H)C(O)Oaryl, 18 -N(H)C(0)Oalkylaryl, -N(H)C(0)Oheteroaryl, -N(H)C(O)Oalkylheteroaryl, -N(H)C(O)Ocycloalkyl, -N(H)C(O)N(H)alkyl, -N(H)C(O)N(alkyl)2, -N(H)C(O)N(H)aryl, -N(H)C{O)N(H)alkylaryl, -N(H)C(0)N(H)heteroaryl, -N(H)C(O)N(H)alkylheteroaryl, -N(H)C(O)N(H)cycloalkyl, -S-alkyl, -S-aryl, -S-alkylaryl, -S(0)2alkyl, -S(O)alkyl, -C(O)alkyl, -CH2NH2, -CH2N(H)alkyl, or -CH2N(alkyl) 2 -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, wherein a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 and the other substituents are as defined above.

Preferably, in any of the above embodiments: m is 0;

R

2 is -H; one R 3 is -H and the other R 3 is -R 8 -alkenyl-R 9 or -alkynyl-R 9 or

R

4 and one R 5 together with the atoms to which they are bound form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1 wherein the ring system is: 19 Rio rR io N, R 1 0 R Rio s. Rio Rio N S Rio N Rio RN Ro NR Ri R 1io Rio Ri N or N In an alternative preferred embodiment, X is

C(R

3 )2 or one R 3 is an amino acid side chain, -R 8 alkenyl-R 9 or alkynyl-R 9 More preferably, one R 3 is -H and the other

R

3 is -alkyl; or

R

4 and one R 5 together with the atoms to which they are bound form a 3 to 7 membered cyclic or heterocyclic ring system, wherein any hydrogen atom bound to a carbon atom of the ring system is optionally replaced by R 10 and any hydrogen atom bound to a nitrogen atom of the ring system is optionally replaced by R 1 selected from: N N N N H3C CH3 RH 0 C H 3 S CH N Cor H 3 Most preferably, one R 3 is -H and the other

R

3 is -C(H)(CH3)2 or -C(CH3)3; and

R

4 and one R 5 together with the atoms to which they are bound form a 3 to 7 membered cyclic or heterocyclic ring system, wherein any hydrogen atom bound to a carbon atom of the ring system is optionally replaced by R 10 and any hydrogen atom bound to a nitrogen atom of the ring system is optionally replaced by R

I

selected from: 21 N N N

N

Ha9

H

3 0 H3 N, S or N CH I or CH In an alternative most preferred embodiment, one R 3 is -H and the other R 3 is -CH3, (CH3)2 or -C(CH3) 3 and R 4 and R 5 are as defined directly above.

According to another embodiment B, the present invention provides a compound of formula I, wherein Y is: 0 R 0 OR 8

R

8 or H H OR 8

OR

12

R

H

0 (f) provided that when R 6 is not hydrogen, R 6 and Y, together with the nitrogen to which they are bound, form a ring 22 N (1<R'3 R13 R (g)

R

12 is -C(O)alkyl, -C(O)cycloalkyl, -C(O)alkyenyl, -C(O)alkylaryl, -C(O)alkylheteroaryl, -C(0)heterocyclyl, or -C(0)alkylheterocyclyl;

R

13 is -alkyl, -aryl, -alkylaryl or -alkylheteroaryl; and the other substituents are as described above.

Preferably, in or

R

8 is methyl, ethyl, n-propyl, isopropyl, cyclopentyl, phenethyl, or benzyl.

Preferred definitions for the other individual components of embodiment B are the same as those set forth above for embodiment

A.

A preferred embodiment C of this invention provides compounds of formula I: 0 5 R2 R 'X N y

R

4 0 wherein: Y is: -23- (a)

R'

H

0 or (b) mr HO H m is 0 or 1; X is -C(R 2

R

1 is H, -R 8

-C(O)R

8

-C(O)C(O)R

8 -S(0)2R 8

-S(O)R

8 -C(0)OR 8

-C(O)N(H)R

8 -S(0)2N(H)-R 8

-S(O)N(H)-R

8 -C(0)C(0)N(H)R 8

-C(O)CH=CHR

8 8

-C(O)CH

2

N(H)R

8

-C(O)N(R

8 2 -S (O)2N(R 8 )2,

-S(O)N(R

8 2 -C(O)C(O)N(R8) 2

-C(O)CH

2

N(R

8 2 -CH2R 8

-CH

2 -alkenyl-R 8 or -CH 2 -alkynyl-R 8

R

2 is -H and each R 3 is independently an amino acid side chain, -R 8 alkenyl-R 9 or alkynyl-R 9 or each R 3 together with the atom to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R 1 0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R I1 a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -R 1 24

R

4 is -H and each R 5 is independently an amino acid side chain, -R 8 -alkenyl-R 9 or -alkynyl-R 9 or R 4 and one R 5 together with the atoms to which they are bound form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is .optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1

R

6 is -H;

R

7 is -OH, -OR 8 -N(H)OH, or -N(H)S(0) 2

R

8 each R 8 is independently -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 each R 9 is independently -aryl, -heteroaryl, cycloalkyl, or -heterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 1 0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 25 each RIO is independently -OH, -SN, -Cl, -Br, -NO 2 -ON, -NH2, -C02H1, -C(O)NH 2

-N(H)C(O)H,

-N(H)C(O)NI

2 -pertluoroalkyl, -0-alkyl, -0-aryl, -0-alkylaryl, -N(H)alkyl, -N(H)aryl, -N(H)-alkylaryl, -N(alkyl) 2 -C(0)N(H)alkyl, -C(0)N(alkyl) 2 -N(E)C(O)alkyl, -N(H)C(0)Oalkyl, -N(H)C(O)Oaryl, -N(H)C(O)Oalkylaryl, -N(N)C(O)Qheteroaryl, -N(H)C(O)Oalkylheteroarya, -N(H)C(O)Ocyclcalkyl, -NMM) C alkyl, -N(H)C(O)N (alkyl) 2 -N(H)C(O)N(H)aryl, -N(H)C(O)N(H)alkylaryl, -N(H)C(0)N(H)heteroarya, -N(H)C(O)N(H)alkylheteroaryl, -N C(O)N cycloalkyl, -5-alkyl, -S-aryl, -S(O)2alkyl, -S(O)alkyl, -C(O)alkyl, -0H2N1 2 -CH2N(H)alkyl, or -CH21N(alky1) 2 -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocycly., -alkylcycloalkyl -alkylaryl, -alkyiheteroaryl, or -alkylheterocycayl, wherein a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by RI and a hydrogen atom bound to any nitrogen atom is optionally replaced by RI; and each R 11 is independently -OH, -SN, -Cl, -Br, -N02, -ON, -NH2, -C02H1, -C(O)NH2, -N(H)C(O)H, -N(H)C(0JN1 2 -alkyl, -cycloalkyl, -perfluoroalkyl, -0alkyl, -0-aryl, -0-alkylaryl, -N(H)alkyl, -N(H)aryl, -N(H)-alkylaryl, -N(alkyl) 2 -C(O)N(11)alkyl, -C (O)N (alkyl) 2, -N C(O)alkyl, C(O)N(H)alkyl, -N(H}C(O)N(alkyl) 2 -5-alkyl, -S-aryl, -S-alkylaryl, -S(O)2alkyl, -S(O)alkyl, -C(O)alkyl, -C112N11 2 -CH2N(N)alkyl, or -CH2N(alkyl) 2 provided that if one R 3 is then the other

R

3 is not 26 .Another preferret embodimenz V of the present invention provides a compot~nd of formula I, wherein Y is-: o t OR 8 t FZP or

R

12 is -C(O)alkya, -C{O)cycloalkyl.

-C (0)alicyenyl, -C cojalkylaryl, -c (0)alkylbeteroaryl, -CCC) heterocyclyl, or -C (0)alkylheterocyclyl.; and the other substituents are as described aboveexcept that both of the R 3 groups may be -H.

In any of embodiments A-It preferred compounds are those wherein:

R

1 is -C(0)R 8 or -C(OU(O)R 8 is R 2 and one R3are both -H and the other R 3 is an amino acid side chain, -R 8 allcenyl-R 5 or alkynyl-R 9 or ii4 and one R5 together with the atoms to which they are bound form a ring system selected from: 27 Rio Rio (CH2 )n

S

RRio o I S N N N Rio Rio Rio Rio N N R0

S

N N

N

I r Ro Rio Ro N N N

H

I I

NNI

,or provided that each of the ring systems are optionally substituted with one or more R 1 0 groups.

-28- Alternatively, preferred compounds of embodiments A-D are those wherein R 3 is -H and the other R 3 is methyl, isopropyl, tert-butyl, -CH 2

SR

8

-CH

2

SO

2 R, -CH 2

CH

2

SR

8

-CH

2

CH

2

SO:.

8 More preferred compounds of embodiments A-D are those wherein R 4 and one R 5 together with the atoms to which they are bound form the ring system:

N

and the other R 5 is H; or one R 3 is -H and the other R 3 is methyl.

Alternatively, more preferred compounds of embodiments A-D are those wherein R 4 and one R together with the atoms to which they are bound form the ring system:

N

and the other R 5 is H.

In the above alternative embodiment, R 10 is preferably, 4-fluoro or 4,4-difluoro.

Most preferred compounds of this invention are those wherein R 3 is. methyl; and

R

4 and one R 5 together with the atoms to which they are bound form the ring system:

N

29 and the other R 5 is H.

Alternatively, most preferred compounds of embodiments A-D are those wherein R 3 is methyl; and

R

4 and one R 5 together with the atoms to which they are bound form the ring system:

>RIO

N

and the other R 5 is H; and R1 0 is 4-fluoro or 4,4-difluoro.

Preferred compounds of embodiments or (D) are those wherein Y is: 0O m 0

H

z wherein Z represents -OR 8 and Z is: CH 3 0, o 0 o 0 0-o 0L ""O 0 O' 0 0 0

OO°

00 00 :t-z 0 0 S 0 0 o Ac 0 0 z 0 z a z

/E

0 0 z z 00(j) 0 31 H2I O N OO

NN

or Specific compounds of this invention include, but are not limited to, Examples 5a-5bd, 7a-7at, 9a-9g, 15a-15f, 16a-16b, 17a-17e, 18a-18f, 20a-20t, 23a-23i, S 24a-24e, 25a-25e, 26a-26h, 27a-27n, 28a-28c, 29a-29s, 32a-32e, 34, G1, G2, 41, 42, 45, 46, 51, 52, 56, 57, 61, 64, 65, 68, 69, 72, 73, 76-93, 98a-z, aa-az, and ba-bb, 101, 102a, 102b, 108a-d, 110, 111, 116a-h, 120a and b, 121, 122 a-v, and 123 a-c.

The compounds of this invention may contain one or more "asymmetric" carbon atoms and thus may occur as racemates and racemic mixtures, single enantiomers, diastereomeric mixtures and individual diastereomers. Each stereogenic carbon may be of the R or S configuration. Although specific compounds and scaffolds exemplified in this application may be depicted in a particular stereochemical configuration, compounds and scaffolds having either the opposite stereochemistry at any given chiral center or mixtures thereof are also envisioned.

All such isomeric forms of these compounds are expressly included in the present invention, as well as pharmaceutically acceptable derivative thereof.

32 The term "pharmaceutically acceptable derivative" means any pharmaceutically acceptable salt, ester, or salt of such ester, of a compound of this invention or any other compound which, upon administration to a recipient, is capable of providing (directly or indirectly) a compound of this invention or an active metabolite or residue thereof.

Pharmaceutically acceptable salts of the compounds of this invention include, for example, those derived from pharmaceutically acceptable inorganic and organic acids and bases. Examples of suitable acids include hydrochloric, hydrobromic, sulfuric, nitric, perchloric, fumaric, maleic, phosphoric, glycolic, lactic, salicylic, succinic, toluene-p-sulfonic, tartaric, acetic, citric, methanesulfonic, formic, benzoic, malonic, naphthalene-2-sulfonic and benzenesulfonic acids. Other acids, such as oxalic, while not in themselves pharmaceutically acceptable, may be employed in the preparation of salts useful as intermediates in obtaining the compounds of the invention and their pharmaceutically acceptable acid addition salts. Salts derived from appropriate bases include alkali metal sodium), alkaline earth metal magnesium), ammonium and N-(C 1 4 alkyl) 4 salts.

This invention also envisions the "quaternization" of any basic nitrogen-containing groups of the compounds disclosed herein. The basic nitrogen can be quaternized with any agents known to those of ordinary skill in the art including, for example, lower alkyl halides, such as methyl, ethyl, propyl and butyl chloride, bromides and iodides; dialkyl sulfates including dimethyl, diethyl, dibutyl and diamyl sulfates; long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and 33 iodides; and aralkyl halides including benzyl and phenethyl bromides. Water or oil-soluble or dispersible products may be obtained by such quaternization.

When multiply substituted, each substituent may be picked independently of any other substituent as long as the combination of substituents results in the formation of a stable compound.

Combinations of substituents and variables envisioned by this invention are only those that result in the formation of stable compounds. The term "stable", as used herein, refers to compounds which possess stability sufficient to allow manufacture and administration to a mammal by methods known in the art.

Typically, such compounds are stable at a temperature of 40 OC or less, in the absence of moisture or other chemically reactive conditions, for at least a week.

Preferred compounds of this invention may be readily absorbed by the bloodstream of patients upon oral administration. This oral availability makes such compounds excellent agents for orally-administered treatment and prevention regimens against IL-1-, apoptosis-, IGIF-, or IFN-y-mediated diseases.

It should be understood that the compounds of this invention may exist in various equilibrium forms, depending on conditions including choice of solvent, pH, and others known to the practitioner skilled in the art. All such forms of these compounds are expressly included in the present invention. In particular, many of the compounds of this invention, especially those which contain aldehyde or ketone groups and carboxylic acid groups in Y, may take hemi-acetal or hydrated forms. For example, compounds of embodiment A are in a hemiacetal form when Y is: 34

HO

Depending on the choice of solvent and other conditions known to the practitioner skilled in the art, compounds of this invention may also take hydrated, acyloxy acetal, acetal, or enol forms. For example, compounds of this invention are in hydrated forms when Y is: O R 8

R

8 H OR 8 and R 8 is H; acyloxy acetal forms when Y is: 0 rm acetal forms when Y is and R 8 is other than H:

R

OR

H OR' and enol forms when Y is: 35 In addition, it should be understood that the equilibrium forms of the compounds of this invention may include tautomeric forms. All such forms of these compounds are expressly included in the present invention.

The compounds of formula I may be synthesized using conventional techniques. Advantageously, these compounds are conveniently synthesized from readily available starting materials.

Compounds of this invention may be prepared using the processes described herein. As can be appreciated by the skilled practitioner, these processes are not the only means by which the compounds described and claimed in this application may be synthesized. Further methods will be evident to those of ordinary skill in the art. Additionally, the various synthetic steps described herein may be performed in an alternate sequence or order to give the desired compounds.

It should be understood that the compounds of this invention may be modified by appropriate functionalities to enhance selective biological properties. Such modifications are known in the art and include those which increase biological penetration into a given biological system blood, lymphatic system, central nervous system), increase oral availability, increase solubility to allow 36 administration by injection, alter metabolism and alter rate of excretion. In addition, the compounds may be altered to pro-drug form such that the desired compound is created in the body of the patient as the result of S the action of metabolic or other biochemical processes on the pro-drug. Such pro-drug forms typically demonstrate little or no activity in in vitro assays.

Some examples of pro-drug forms include ketal, acetal, oxime, imine and hydrazone forms of compounds which contain ketone or aldehyde groups, especially where they occur in the Y group of the compounds of this invention. Other examples of pro-drug forms include the hemi-ketal, hemi-acetal, acyloxy ketal, acyloxy acetal, ketal, acetal and enol forms that are described herein.

37 Compositions and Methods The compounds of this invention are caspase inhibitors, and in particular ICE inhibitors.

Accordingly, these compounds are capable of targeting and inhibiting events in IL-a-, apoptosis-, IGIF-, and IFN-y-mediated diseases, and, thus, the ultimate activity of that protein in inflammatory diseases, autoimmune diseases, destructive bone, proliferative disorders, infectious diseases, and degenerative diseases. For example, the compounds of this invention inhibit the conversion of precursor IL-lP to mature ILi4 by inhibiting ICE. Because ICE is essential for the production of mature IL-l, inhibition of that enzyme effectively blocks initiation of IL-i-mediated physiological effects and symptoms, such as inflammation, by inhibiting the production of mature IL-i. Thus, by inhibiting IL-1 precursor activity, the compounds of this invention effectively function as IL-I inhibitors.

Compounds of this invention also inhibit conversion of pro-IGIF into active, mature IGIF by inhibiting ICE. Because ICE is essential for the production of mature IGIF, inhibition of ICE effectively blocks initiation of IGIF-mediated physiological effects and symptoms, by inhibiting production of mature IGIF. IGIF is in turn essential for the production of IFN-y. ICE therefore effectively blocks initiation of IFN-y- mediated physiological effects and symptoms, by inhibiting production of mature IGIF and thus production of IFN-y.

The compounds of this invention are surprisingly bicavailable when compared with peptidyl inhibitors, such as those described in, for example, EP 618 223, EP 623 592, WO 93/09135, WO 93/16710, US patent no. 5,434,248, WO 95/35308, or WO 96/33209.

38 Thus, the pharmaceutical compositions and methods of this invention will be useful for controlling caspase activity in vivo. The compositions and methods of this invention will therefore be useful for controlling IL- 1, IGIF, or IFN-y levels in vivo and for treating or reducing the advancement, severity or effects of IL-1-, apoptosis-, IGIF-, or IFN-y-mediated conditions, including diseases, disorders or effects.

Pharmaceutical compositions of this invention comprise a compound of formula I or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier. Such compositions may optionally comprise an additional therapeutic agent. Such agents include, but are not limited to, an anti-inflammatory agent, a matrix metalloprotease inhibitor, a lipoxygenase inhibitor, a cytokine antagonist, an immunosuppressant, an anti-cancer agent, an anti-viral agent, a cytokine, a growth factor, an immunomodulator, a prostaglandin or an anti-vascular hyperproliferation compound.

The term "pharmaceutically acceptable carrier" refers to a non-toxic carrier that may be administered to a patient, together with a compound of this invention, and which does not destroy the pharmacological activity thereof.

Pharmaceutically acceptable carriers that may be used in the pharmaceutical compositions of this invention include, but are not limited to, ion exchangers, alumina, aluminum stearate, lecithin, serum proteins, such as human serum albumin, buffer substances such as phosphates, glycine, sorbic acid, potassium sorbate, partial glyceride mixtures of saturated vegetable fatty acids, water, salts or electrolytes, such as protamine sulfate, disodium hydrogen phosphate, potassium hydrogen phosphate, 39 sodium chloride, zinc salts, colloidal silica, magnesium trisilicate, polyvinyl pyrrolidone, cellulose-based substances, polyethylene glycol, sodium carboxymethylcellulose, polyacrylates, waxes, polyethylene-polyoxypropylene-block polymers, wool fat and self-emulsifying drug delivery systems (SEDDS) such as c-tocopherol, polyethyleneglycol 1000 succinate, or other similar polymeric delivery matrices.

In pharmaceutical composition comprising only a compound of embodiments A-D as the active component, methods for administering these compositions may additionally comprise the step of administering to the subject an additional agent. Such agents include, but are not limited to, an anti-inflammatory agent, a matrix metalloprotease inhibitor, a lipoxygenase inhibitor, a cytokine antagonist, an immunosuppressant, an anti-cancer agent, an anti-viral agent, a cytokine, a growth factor, an immunomodulator, a prostaglandin or an anti-vascular hyperproliferation compound.

The term "pharmaceutically effective amount" refers to an amount effective in treating or ameliorating an IL-1-, apoptosis-, IGIF-, or IFNy-mediated disease in a patient. The term "prophylactically effective amount" refers to an amount effective in preventing or substantially lessening ILapoptosis-, IGIF-, or IFN-y-mediated diseases in a patient.

The compounds of this invention may be employed in a conventional manner for controlling IGIF and IFN-y levels in vivo and for treating diseases or reducing the advancement or severity of effects which are mediated by IL-1, apoptosis, IGIF, or IFN-y. Such methods of treatment, their dosage levels and requirements may be selected by those of ordinary skill in the art from available methods and techniques.

40 For example, a compound of this invention may be combined with a pharmaceutically acceptable adjuvant for administration to a patient suffering from an IL-1-, apoptosis-, IGIF-, or IFN-y-mediated disease in a pharmaceutically acceptable manner and in an amount effective to lessen the severity of that disease.

Alternatively, the compounds of this invention may be used in compositions and methods for treating or protecting individuals against IL-1, apoptosis-, IGIF, or IFN-y mediated diseases over extended periods of time. The compounds may be employed in such compositions either alone or together with other compounds of this invention in a manner consistent with the conventional utilization of enzyme inhibitors in pharmaceutical compositions. For example, a compound of this invention may be combined with pharmaceutically acceptable adjuvants conventionally employed in vaccines and administered in prophylactically effective amounts to protect individuals over an extended period of time against ILapoptosis-, IGIF, or IFN-y mediated diseases.

The compounds of formula I may also be coadministered with other caspase or ICE inhibitors to increase the effect of therapy or prophylaxis against various IL-1-, apoptosis-, IGIF-, or IFN-y mediated diseases.

In addition, the compounds of this invention may be used in combination either conventional antiinflammatory agents or with matrix metalloprotease inhibitors, lipoxygenase inhibitors and antagonists of cytokines other than The compounds of this invention can also be administered in combination with immunomodulators bropirimine, anti-human alpha-interferon antibody, IL-2, GM-CSF, methionine enkephalin,

I

41 interferon-alpha, diethyldithiocarbamate, tumor necrosis factor, naltrexone and EPO), with prostaglandins, or with antiviral agents 3TC, polysulfated polysaccharides, ganiclovir, ribavirin, acyclovir, alpha interferon, trimethotrexate and fancyclovir) or prodrugs of these or related compounds to prevent or combat IL-1-mediated disease symptoms such as inflammation.

When the compounds of this invention are administered in combination therapies with other agents, they may be administered sequentially or concurrently to the patient. Alternatively, pharmaceutical or prophylactic compositions according to this invention comprise a combination of a compound of formula I and another therapeutic or prophylactic agent.

The pharmaceutical compositions of this invention may be administered orally, parenterally, by inhalation spray, topically, rectally, nasally, buccally, vaginally or via an implanted reservoir. We prefer oral administration. The pharmaceutical compositions of this invention may contain any conventional non-toxic pharmaceutically-acceptable carriers, adjuvants or vehicles. In some cases, the pH of the formulation may be adjusted with pharmaceutically acceptable acids, bases or buffers to enhance the stability of the formulated compound or its delivery form. The term parenteral as used herein includes subcutaneous, intracutaneous, intravenous, intramuscular, intra-articular, intrasynovial, intrasternal, intrathecal, intralesional and intracranial injection or infusion techniques.

The pharmaceutical compositions may be in the form of a sterile injectable preparation, for example, as a sterile injectable aqueous or oleaginous 42 suspension. This suspension may be formulated according to techniques known in the art using suitable dispersing or wetting agents (such as, for example, Tween 80) and suspending agents. The sterile injectable preparation may also be a sterile injectable solution or suspension in a non-toxic parenterallyacceptable diluent or solvent, for example, as a solution in 1,3-butanediol. Among the acceptable vehicles and solvents that may be employed are mannitol, water, Ringer's solution and isotonic sodium chloride solution. In addition, sterile, fixed oils are conventionally employed as a solvent or suspending medium. For this purpose, any bland fixed oil may be employed including synthetic mono- or diglycerides.

Fatty acids, such as oleic acid and its glyceride derivatives are useful in the preparation of injectables, as are natural pharmaceutically-acceptable oils, such as olive oil or castor oil, especially in their polyoxyethylated versions. These oil solutions or suspensions may also contain a long-chain alcohol diluent or dispersant, such as those described in Pharmacopeia Helvetica, or a similar alcohol.

The pharmaceutical compositions of this invention may be orally administered in any orally acceptable dosage form including, but not limited to, capsules, tablets, and aqueous suspensions and solutions. In the case of tablets for oral use, carriers which are commonly used include lactose and corn starch. Lubricating agents, such as magnesium.

stearate, are also typically added. For oral administration in a capsule form, useful diluents include lactose and dried corn starch. When aqueous suspensions and solutions and propylene glycol are administered orally, the active ingredient is combined with emulsifying and suspending agents. If desired, 43 certain sweetening and/or flavoring and/or coloring agents may be added.

The pharmaceutical compositions of this invention may also be administered in the form of suppositories for rectal administration. These compositions can be prepared by mixing a compound of this invention with a suitable non-irritating excipient which is solid at room temperature but liquid at the rectal temperature and therefore will melt in the rectum to release the active components. Such materials include, but are not limited to, cocoa butter, beeswax and polyethylene glycols.

Topical administration of the pharmaceutical compositions of this invention is especially useful when the desired treatment involves areas or organs readily accessible by topical application. For application topically to the skin, the pharmaceutical composition should be formulated with a suitable ointment containing the active components suspended or dissolved in a carrier. Carriers for topical administration of the compounds of this invention include, but are not limited to, mineral oil, liquid petroleum, white petroleum, propylene glycol, polyoxyethylene polyoxypropylene compound, emulsifying wax and water. Alternatively, the pharmaceutical composition can be formulated with a suitable lotion or cream containing the active compound suspended or dissolved in a carrier. Suitable carriers include, but are not limited to, mineral oil, sorbitan monostearate, polysorbate 60, cetyl esters wax, cetearyl alcohol, 2octyldodecanol, benzyl alcohol and water. The pharmaceutical compositions of this invention may also be topically applied to the lower intestinal tract by rectal suppository formulation or in a suitable enema 44 formulation. Topically-administered transdermal patches are also included in this invention.

The pharmaceutical compositions of this invention may be administered by nasal aerosol or inhalation. Such compositions are prepared according to techniques well-known in the art of pharmaceutical formulation and may be prepared as solutions in saline, employing benzyl alcohol or other suitable preservatives, absorption promoters to enhance bioavailability, fluorocarbons, and/or other solubilizing or dispersing agents known in the art.

Dosage levels of between about 0.01 and about 100 mg/kg body weight per day, preferably between and about 75 mg/kg body weight per day and most preferably between about 1 and 50 mg/kg body weight per day of the active ingredient compound are useful in a monotherapy for the prevention and treatment of IL-1-, apoptosis-, IGIF-, and IFN-y mediated diseases, including inflammatory diseases, autoimmune diseases, destructive bone disorders, proliferative disorders, infectious diseases, degenerative diseases, necrotic diseases, inflammatory peritonitis, osteoarthritis, acute pancreatitis, chronic pancreatitis, asthma, adult respiratory distress syndrome, glomerulonephritis, rheumatoid arthritis, systemic lupus erythematosus, scleroderma, chronic thyroiditis, Graves' disease, autoimmune gastritis, insulin-dependent diabetes mellitus (Type autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopenia, chronic active hepatitis, myasthenia gravis, inflammatory bowel disease, Crohn's disease, psoriasis, atopic dermatitis, graft vs. host disease, osteoporosis, multiple myelomarelated bone disorder, leukemias and related disorders, myelodysplastic syndrome, acute myelogenous leukemia, chronic myelogenous leukemia, metastatic melanoma, 45 Kaposi's sarcoma, multiple myeloma, sepsis, septic shock, Shigellbsis, Alzheimer's disease, Parkinson's disease, cerebral ischemia, myocardial ischemia, spinal muscular atrophy, multiple sclerosis, AIDS-related encephalitis, HIV-related encephalitis, aging, alopecia, neurological damage due to stroke, ulcerative collitis, infectious hepatitis, juvenile diabetes, lichenplanus, acute dermatomyositis, eczema, primary cirrhosis, uveitis, Behcet's disease, atopic skin disease, pure red cell aplasia, aplastic anemia, amyotrophic lateral sclerosis, nephrotic syndrome and systemic diseases or diseases with effects localized in the liver or other organs having an inflammatory or apoptotic component caused by excess dietary alcohol intake or viruses, such as HBV, HCV, HGV, yellow fever virus, dengue fever virus, and Japanese encephalitis virus.

Typically, the pharmaceutical compositions of this invention will be administered from about 1 to times per day or alternatively, as a continuous infusion. Such administration can be used as a chronic or acute therapy. The amount of active ingredient that may be combined with the carrier materials to produce a single dosage form will vary depending upon the host treated and the particular mode of administration. A typical preparation will contain from about 5% to about active compound Preferably, such preparations contain from about 20% to about 80% active compound.

When the compositions of this invention comprise a combination of a compound of formula I and one or more additional therapeutic or prophylactic agents, both the compound and the additional agent should be present at dosage levels of between about 46 to 80% of the dosage normally administered in a monotherapy regime.

Upon improvement of a patient's condition, a maintenance dose of a compound, composition or combination of this invention may be administered, if necessary. Subsequently, the dosage or frequency of administration, or both, may be reduced, as a function of the symptoms, to a level at which the improved condition is retained when the symptoms have been alleviated to the desired level, treatment should cease. Patients may, however, require intermittent treatment on a long-term basis upon any recurrence or disease symptoms.

As the skilled artisan will appreciate, lower or higher doses than those recited above may be required. Specific dosage and treatment regimens for any particular patient will depend upon a variety of factors, including the activity of the specific compound employed, the age, body weight, general health status, stx, diet, time of administration, rate of excretion, drug combination, the severity and course of the disease, and the patient's disposition to the disease and the judgment of the treating physician.

IL-I or apoptosis mediated diseases which may be treated or prevented by the compounds of this invention include, but are not limited to, inflammatory diseases, autoimmune diseases, proliferative disorders, infectious diseases, and degenerative diseases. The apoptosis-mediated diseases which may be treated or prevented by the compounds of this invention include degenerative diseases.

IL-1 or apoptosis mediated inflammatory diseases which may be treated or prevented include, but are not limited to osteoarthritis, acute pancreatitis, chronic pancreatitis, asthma, and adult respiratory 47 distress syndrome. Preferably the inflammatory disease is osteoarthritis or acute pancreatitis.

IL-I or apoptosis mediated autoimmune diseases which may be treated or prevented include, but are not limited to, glomerulonephritis, rheumatoid arthritis, systemic lupus erythematosus, scleroderma, chronic thyroiditis, Graves' disease, autoimmune gastritis, insulin-dependent diabetes mellitus (Type autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopenia, chronic active hepatitis, myasthenia gravis, multiple sclerosis, inflammatory bowel disease, Crohn's disease, psoriasis, atopic dermatitis and graft vs. host disease.

Preferably the autoimmune disease is rheumatoid arthritis, inflammatory bowel disease, Crohn's disease, psoriasis, or atopic dermatitis.

IL-I or apoptosis mediated destructive bone disorders which may be treated or prevented include, but are not limited to, osteoporosis and multiple myeloma-related bone disorder.

IL-1 or apoptosis mediated proliferative diseases which may be treated or prevented include, but are not limited to, leukemias and related disorders, such as myelodysplastic syndrome, acute myelogenous leukemia, chronic myelogenous leukemia, metastatic melanoma, Kaposi's sarcoma, and multiple myeloma.

IL-l or apoptosis mediated infectious diseases which may be treated or prevented include, but are not limited to, sepsis, septic shock, and Shigellosis.

IL-1 or apoptosis mediated degenerative or necrotic diseases which may be treated or prevented by the compounds of this invention include, but are not limited to, Alzheimer's disease, Parkinson's disease, cerebral ischemia, and myocardial ischemia.

48 Preferably, the degenerative disease is Alzheimer's disease.

IL-1 or apoptosis-mediated degenerative diseases which may be treated or prevented by the compounds of this invention include, but are not limited to, Alzheimer's disease, Parkinson's disease, cerebral ischemia, myocardial ischemia, spinal muscular atrophy, multiple sclerosis, AIDS-related encephalitis, HIV-related encephalitis, aging, alopecia, and neurological damage due to stroke.

Other diseases having an inflammatory or apoptotic component may be treated or prevented by the compounds of this invention. Such diseases may be systemic diseases or diseases with effects localized in the liver or other organs and may be caused by, for example, excess dietary alcohol intake or viruses, such as HBV, HCV, HGV, yellow fever virus, dengue fever virus, and Japanese encephalitis virus.

IGIF- or IFN-y-mediated diseases which may be treated or prevented by the compounds of this invention include, but are not limited to, inflammatory, infectious, autoimmune, proliferative, neurodegenerative and necrotic conditions.

IGIF- or IFN-y-mediated inflammatory diseases which may be treated or prevented include, but are not limited to osteoarthritis, acute pancreatitis, chronic pancreatitis, asthma, rheumatoid arthritis, inflammatory bowel disease, Crohn's disease, ulcerative collitis, cerebral ischemia, myocardial ischemia and adult respiratory distress syndrome. Preferably, the inflammatory disease is rheumatoid arthritis, ulcerative collitis, Crohn's disease, hepatitis or adult respiratory distress syndrome.

IGIF- or IFN-y-mediated infectious diseases which may be treated or prevented include, but are not r 1. li 1 49 limited to infectious hepatitis, sepsis, septic shock and Shigellosis.

IGIF- or IFN-y-mediared autoimmune diseases which may be treated or prevented include, but are not limited to glomerulonephritis, systemic lupus erythematosus, scleroderma, chronic thyroidicis, Graves' disease, autoimmune gastritis, insulindependent diabetes mellitus (Type juvenile diabetes, autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopeia, myasthenia gravis, multiple sclerosis, psoriaEis. lichenplanus, graft vs.

host disease, acute dermatomyosiris, eczema, primary cirrhosis, hepatitis, uveitis, Behcet's disease, atopic skin disease, pure red cell aplasia, aplastic anemia, amyotrophic lateral sclerosis and nephrotic syndrome.

Preferably, the autoimmune disease is glomezulonephritis, insulin-dependent diabetes mellitus (Type juvenile diabetes, psoriasis, graft vs. host disease or hepatitis.

More preferred diseases which may be treated or prevented include rheumatoid arthritis, inflammatory bowel disease, including Crohn's disease and ulcerative colitis, inflammatory peritonitis, septic shock, pancreatitis, traumatic brain injury, organ transplant rejection, osteoarthritis, asthma, psoriasis, Alzheimer's disease, aropic dermatitis, or leukemias and related disorders, such as myelodysplastic syndrome or multiple myeloma.

Accordingly, one embodiment of this invention provides a method for treating or preventing an IL-1 or apoptosis mediated disease in a subject comprising the step of administering to the subject any compound, pharmaceutical composition, or combination described herein and a pharmaceutically acceptable carrier.

Another embodiment of this invention provides a method for decreasing IGIF production in a subject comprising the step of administering to the subject any compound, pharmaceutical composition, or combination described herein and a pharmaceutically acceptable carrier.

Yet another embodiment of this invention provides a method for decreasing IFN-y production in a subject comprising the step of administering to the subject any compound, pharmaceutical composition, or combination described herein and a pharmaceutically acceptable carrier.

Although this invention focuses on the use of the compounds disclosed herein for preventing and treating IL-1, apoptosis-, IGIF, and IFN-y-mediated diseases, the compounds of this invention can also be used as inhibitory agents for other cysteine proteases.

The compounds of this invention are also useful as commercial reagents which effectively bind to caspases or other cysteine proteases including, but not limited to ICE. As commercial reagents, the compounds of this invention, and their derivatives, may be used to block proteolysis of a target peptide in biochemical or cellular assays for ICE and ICE homologs or may be derivatized to bind to a stable resin as a tethered substrate for affinity chromatography applications.

These and other uses which characterize commercial cysteine protease inhibitors will be evident to those of ordinary skill in the art.

In order that this invention be more fully understood, the following examples are set forth.

These examples are for the purpose of illustration only and are not to be construed as limiting the scope of the invention in any way.

51 GENERAL METHODS Analytical HPLC conditions: Column: C-18, Particle size: 5 p, Pore size: o100kA, Column size: 4.6 x 150 mm Solvent A: 0.1% TFA 1% MeCN 98.9% water Solvent B: 0.1% TFA 99.9% MeCN Gradient: A to B over 20 min at a flow rate of 1 mL/min Column: Cyano, Particle size: 5 p, Pore size: 100A, Column size: 4.6 x 150 mm Solvent A: 0.1% TFA 1% MeCN 98.9% water Solvent B: 0.1% TFA 99.9% MeCN Gradient: A B 99% 1% to 50% 50% over 20 min at a flow rate of 1 mL/min HPLC Mass Spectral Analysis Mass Spectral Analysis: All mass spectral data were collected using a Micromass Quattro II triple quadrupole mass spectrometer (Beverly, MA) equipped with a cross-flow electrospray ionization source. The mass spectrometer was coupled to a HPLC system manufactured by Hewlett-Packard (HPll00) The autosampler for the system was a Gilson 215 (Middleton, WI) liquid handler. All of the equipment was controlled by the MassLynx software package purchased from Micromass.

Mass spectral analysis was performed by liquid chromatography-MS to determine purity and confirm molecular weight simultaneously. In instances 52 where the sample purity had been determined by other means, a flow injection analysis (FIA) was used instead of the full chromatography analysis. In all cases, both positive and negative ion spectra were collected.

Mass Spectrum Acquisition Conditions: For all experiments, the mass spectrometer was configured in electrospray mode with the cross-flow counter electrode. A flow splitter was used to reduce the flow from the HPLC to 40% of the original flow. The inlet temperature was set to 140 °C and the drying gas flow was set to maximize signal. The resolution of the mass spectrometer was adjusted to 0.65 amu FWHM and data was collected in centroid mode. In positive ion mode, the cone voltage was set to 25V, the capillary voltage was 3.8 kV. In negative ion mode, the cone voltage was set to 25 V and the capillary voltage was set to 3.5 kV.

In both.positive and negative ion mode, the time to acquire a full spectrum was Is with a switching time of 0.25 seconds between scans. The mass range scanned for molecules with an expected molecular weight of less than 350 amu was 70-500 m/z while for molecules with a expected mass of more than 350 amu the mass to charge ratio scanned was 200-1000 m/z.

Chromatography Conditions: Liquid chromatography was performed using a YMC AQ C18 column (150 mm X 3mm with 5gm particle and a 120A pore size).

For all analysis, MeCN with 0.2 formic acid was combined with water with 0.2% formic acid to form the elution gradient. The gradient profile consisted of starting with 15 MeCN: water and increasing the amount of MeCN linearly over ten minutes to 90%. That concentration was held constant for 2 minutes before returning to initial conditions. During the entire analysis the flow rate was 0.9mL/min.

53 Flow Injection Conditions: A 1:1 mixture of the water to MeCN (both with 0.2% formic acid added) was used to acquire the FIA data. The flow rate was set to 0.3 ml/min.

-H NMR All H NMR spectra were acquired using a Bruker Instruments AMX-500 NMR spectrometer in the solvent given.

SYNTHETIC METHODS General Procedure for the Preparation of Compounds of Formula I, Embodiment C (Schemes I-VI) 54 Procedure for the preparation of analogs Scheme I Step 1 H2N--- H^ e 1 0) Fmocr.

H

Fm°oc-N7 Step 2 0- OH

V

Fmoc, N Step 3 Fmo S N' LR 4 Step 41 Ri-CO2H Ri, N N 02H 0

N

0 LR= -NH H H 0 In Schemes I-VIII, the variable LR refers to the linker-resin and is defined as shown above in Scheme I.

Step 1: A 6.7 g portion (0.8 mmol/gram loading, 5.36 mmol) of 4-methyl benzhydrylamine hydrochloride salt resin (Scheme I) was washed with DMF (3 x 50 mL) DIEA/DMF (3 x 50 mL) and N-methylpyrrolidinone (NMP) (3 55 x 50 mL). To a suspension of the washed resin in 25 mL of NMP was added successively compound 1 (1.1 eq, g, 5.90 mmol) DIEA 13.33 eq, 3.1 mL, 17.70 mmol), 1hydroxybenzotriazole hydrate (HOBt) (1.1 eq, 797 mg, 5.90 mmol). and 0-benzotriazole-N,N.NN'tetramethyluronium hexafluorophosphate (HBTU) (1.1 eq, 2.24 g, 5.90 mmol). Compound 1 was prepared according to the literature procedure of A. M. Murphy et al, J- Am. Chem. Soc., 114, pp. 3156-3157 (1992). The mixture was rotated at room temperature overnight using a wrist arm shaker.

The resulting mixture was filtered, and the resin was rinsed with DMF then treated with 12 mL of a solution of acetic anhydride in DMF for 30 minutes at room temperature. The mixture was filtered, and the resin was washed successively with DMF (2 x S0mL), (50mL), 1:1 DMF/ CH 2

CI

2 (2 x 50mL), CH 3 OH and CH 2 C12 (3 x 50mL). After drying in vacuo, grams of resin 2 were obtained (0.48 mmol/gram loading).

Step 2: To 4.5 g of resin 2 (0.48 mmol/gram, 2.16 mmol) was added 25 mL of a 20% solution of piperidine in DMP.

The suspension was rotated at room temperature for minutes and drained. The procedure was repeated over minutes. The resin was then washed successively with DMF (2 x 40 ML) CH30 (40 mL) CH 2 C12 (2 x 40 mL),

CR

3 OH (40 mL) and NMP (40 To a suspension of resin in 40 mL of NMP was added successively 2.92 g of N-Fmoc-proline (4 eq, 8.64 mmol), 3 0 mIL of DIEA (8 eq, 17.28 mmol), 1.17 g of HOBL (4 eq, 8.64 mmol) and 3.27 g of HBTU (4 eq, 8.64 mmol). The mixture was rotated at room temperature overnight and drained. This 56 coupling procedure was repeated over 3 hours. The resin was then washed successively with DMF (2 x mL), CH 3 0H (40 mL), 1:1 DMF/ CH 2 C12 (2 x 40 mL), CH 3

OH

mL) and CH 2

CI

2 (3 x 40 mL), and briefly dried in vacuo to afford resin 3.

Step 3: A suspension of resin 3 in 25 mL of a solution of piperidine in DMF was rotated at room temperature for 5 minutes. The suspension was drained.

The procedure was repeated over 20 minutes. The resin was washed successively with DMF (2 x 40 mL), CH 3 0H mL) CH 2 C1 2 (2 x 40 mL), CH30H (40 mL) and NMP (2 x mL) To a suspension of resin in 40 mL of NMP was added successively 2.93 g of N-Fmoc-valine (4 eq, 8.64 mmol), 3.0 mL of DIEA (8 eq, 17.28 mmol), 1.17 g of HOBt (4 eq, 8.64 mmol) and 3.27 g of HBTU (4 eq, 8.64 mmol). The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was then washed successively with DMF (2 x 40 mL) CH30H (40 mL), 1:1 DMF/ CH 2 C1 2 (2 x 40 mL), CH30H (40 mL) and CH 2

CI

2 (3 x mL), and dried in vacuo to afford resin 4 (0.45 mmol/gram).

Step 4: To a 0.05 mmol portion of resin 4 was added 2 mL of a 20% solution of piperidine in DMF. The suspension was rotated at room temperature for minutes, and drained. The procedure was repeated over minutes. The resulting resin was washed successively with DMF (3 x 5 mL), CH 3 0H (5 mL), and NMP (3 x 5 mL). The desired carboxylic acid was then added (4 eq, 0.2 mmol), followed by 0.8 mL of a 0.25M solution of HOBt in NMP, 0.14 mL of DIEA (8 eq, 0.4 57 mmol) and 0.8 mL of a 0.25M solution of HBTU in NMP.

The mixture was rotated at room temperature overnight and drained. The resin was washed successively with DMF (2 x 5 mL), CH30H (5 mL), 1:1 DMF/ CH 2 C12 (2 x mL), CH 3 0H (5 mL) and CH 2 Cl 2 (3 x 5 mL), and dried in vacuo. A 2 mL portion of a 95% solution of TFA in water was then added to the resin. The mixture was stirred at room temperature for one hour, and filtered.

The filtrate was evaporated, and the residue was taken up in acetonitrile-water and purified by preparative HPLC to afford compounds Product yield, analytical HPLC conditions, HPLC retention time, product purity, and mass spectral data obtained for examples 5a-5bd, 7a-7at, 9a-9g, 15f, 16a-16b, 17a-17e, 18a-18f, 20a-20t, 23a-23i, 24a- 24e, 25a-25e, 26a-26h, 27a-27n, 28a-28c, 29a-29s, 32a- 32e are provided in Table 1 unless noted otherwise.

Table 1. Physical Data for Selected Examples Ex. Yield HPLC RT (min) Purity Mass Spec (mg) Gradient (M+H or /time (min) M+Na) 1.0 5-45%/10' 4.66 92 475.2 1.0 5-45%/10' 6.86 85 457.2 4.0 5-45%/10' 5.98 85 469.2 1.5 5-45%/10' 6.82 95 467.5 1.0 5-45%/10' 5.52 95 418.2 0.6 5-45%/10' 4.28 93 434.2 6.4 10-60%/10' 8.57 97 504.7(+Na) 15.6 10-60%/10' 4.51 99 459.2 6.6 5%-90%/10' 9.34 90 506.1 5.1 5%-90%/10' 10.04 95 506.1 10.7 5%-90%/10' 8.64 85 520.1 51 6.6 5%-90%/10' 8.72 85 540.1 6.8 5%-90%/10' 7.89 85 502.0 1.9 6.46 85 494.1 3.8 5%-90%/10' 7.04 85 506.1 6.8 5%-90%/10' 11.62 95 576.0 2.2 5%-90%/10' 9.72 90 508.1 3.8 5%-90%/10' 7.27 85 462.1 4.3 5%-90%/10' 6.46 90 470.1 58 Ex. Yield HPLC RT (min) Purity Mass Spec (mg) Gradient (M+H or /time (min) M+Na) 5.9 51-601/9' 10.27 90 486.2 60%-90k/2' Su 3.1 51-60*/9' 9.09 80 522.

60%-90/2' 1.0 51-60t9' 11.63 85 502.2 601-90*12' 10.3 51k60%/91 8.75 95 470.2 601;-90*/21 Sx 8.8 5%-60%9' 8.88 95 565.1 60*-90*/21 Sy 6.6 51-601/9' 12.32 95 518.2 60%-900/2' Sz 10.2 51-601/9' 12.63 95 502.2 601-90*/2' Saa 2.5 51-601/9' 9.57 95 554.1 601-901/2' Sab 7.8 51-601/9' 10.54 85 538.2 60%-901/2' Sac 1.4 9.28 95 476.2 60k-901/2' Sad 5.3 6.51 85 463.2 60%-90%/2' Sae 4.3 5t-60%/9' 9.81 95 551.1 60%-901/2' Saf 0.9 5k-60%/9' 9.98 90 547.4 601-90-/2' Sag 5.7 51-601/9' 10.31 90 526.2 601-901/2' 1.4 T o-60%/g, 8.13 85 542.1 601-901/2' Sai 10.9 101-901/10' 5.88 85 584.2 Saj 4.2 101-901/10' 5.89 90 556.2 Sak 7.8 10*-901/10' 5.54 85 568.3 Sal 8.4 T5Vgo-i10 6.25 95 516.2 7.6 101-901/10' 6.49 95 474.3 San 6.2 101-901/10' 6.00 95 500.2 Sao 9.4 101-901/10' 6.68 95 581.3 Sap 6.4 101-90/10' 4.30 90 500.3 Saq 5.2 101-901/10' 6.45 95 559.2 Sar 1.4 101-901/10' 5.38 90 561.3 Sas 16.2 101-901/10' 4.25 95 475.2 Sat 15.4 101-901/10' 6.68 95 560.3 Sau 5.9 10%-901/10' 6.70 90 498.3 4.1 101-901/10' 5.13 85 531.2 5.5 10%-90%/10' 6.53 85 570.3 Sax 14.0 10%-90/10' 6.26 90 557.3 59 Ex. Yield HPLC RT (min) Purity Mass Spec i(mg) Gradient (M+H or /time (min) M+Na) Say 10.4 10%-90%/10' 6.52 90 510.3 9.2 10%-90%/10' 5.96 95 522.3 8.5 10%-90%/10' 6.69 95 562.3 4.6 10%-90%/10' 6.00 85 520.2 8.8 10%-90%/10' 4.96 90 546.2 8.2 10%-90%/10' 8.01 95 536.3 7a 2.1 5-45%/10' 5.28 86 440.2 7b 1.7 5-45%/10' 4.12 94 390,2 7c 0.5 5-45%/10' 4.04 94 434.2 7d 1.1 5-45%/10' 4.29 95 441.2 7e 1.1 5-45%/10' 3.28 98 447.2 7f 1.0 5-45%/10' 3.96 97 420.2 7g 11.0 10%-90%/10' 4.00 95 483.4 7h 6.0 10%-90%/10' 4.90 95 439.3 7i 12.0 10%-90%/10' 6.40 95 474.3 7j 6.6 10%i-90%/10' 4.50 95 461.4 7k 4.0 10%-90%/10' 5.40 95 480.4 71 8.6 10%-90%/10' 2.61 95 435.3 7m 6.0 10%-90%/10' 4.29 95 438.4 7n 15.4 10%-90%/10' 2.00 85 433.4 8.4 10%-90%/10' 4.01 90 470.0 7p 3.0 10%-90%/10' 4.61 95 434.4 7q 5.7 10%-90%/10' 3.89 95 434.3 7r 8.8 10%-90&/10' 2.94 95 425.3 7s 10.5 10%-90%/10' 3.89 90 433.4 7t 6.9 10%-90%/10' 2.45 85 419.3 7u 11.6 10%-90%/10' 1.98 85 433.3 7v 4.6 10%-90%/10' 4.60 95 489.4 7w 13.8 10%-90%/10' 4.20 95 453.3 7x 6.0 10%-90%/10' 3.90 95 483.2 7y 12.0 10%-90%/10' 5.40 95 489.2 72 10.0 10%-90%/10' 5.40 95 517.2 7aa 11.0 10%-90%/10' 5.30 95 453.8 7ab 10.0 10%-90*/10' 5.60 95 595.1 7ac 3.9 10-60%/10' 4.59 88 469.2 7ad 13.0 5-45%/10' 4.48 88 415.2 7ae 4.9 5-45%/10' 4.37 88 426.2 7af 20.6 5-45%/10' 4.68 86 405.3 7ag 14.9 5-45%/10' 4.78 82 406.3 7ah 9.5 5-45%/10' 7.40 91 447.3(+Na) 7ai 10.8 5-45%/10' 9.21 95 480.8(+Na) 7aj 8.3 5-45%/10' 9.14 92 481.1(+Na) 7ak 13.6 5-45%/10' 8.05 96 464.8(+Na) 7al 8.1 5-45!/10' 7.04 91 448.8(+Na) 7am 7.8 5-45%/10' 8.54 90 480.4(+Na) 60 Ex. Yield HPLC RT (min) Purity Mass Spec (mg) Gradient (M+H or /time (min) M+Na) 7an 4.3 5-45%/10' 7.48 88 460.9(+Na) 7ao 13.5 5-45t/10' 7.45 92 460.7(+Na) 7ap 2.5 5-45%/10' 6.52 93 440.3(+Na) 7aq 1.4 5-45*%/10' 3.30 84 405.2 7ar 15.10 5-45%/10' 3.79 97 413.30 7as 15.70 5-45%/10' 5.50 88 441.30 7at 22.20 5-45%/10' 4.49 94 415.30 9a 0.5 10-60%/10' 7.08 98 527.4 (+Na) 9b 1.2 10-60%/10' 8.31 93 570.5(+Na) 9c 2.5 10-60%/10' 8.46 97 569.6 9d 1.2 10-60%/10' 7.22 85 562.1 9e 0.4 10-60t/10' 7.86 95 543.2(+Na) 9f 4.3 10-60%/10' 8.11 96 542.5 9g 2.1 10-60%/10' 7.18 93 526.3 1.0 10%-60%/10' 5.76 95 477.6 3.9 10%-60%/i10' 6.32 91 483.8 2.9 10%-90%/10' 3.30 85 463.3 1.3 10%-90%/10' 4.26 95 531 1.0 10%-90%/10' 3.10 85 482.3 1.2 10%-90%/10' 3.60 95 484.6 16a 2.5 10%-90%/10' 2.80 95 456.3 16b 6.0 10%-90%/10' 1.90 95 454.2 17a 1.0 I0%-90%/10' 3.30 85 496.8 17b 1.1 10%-90%/10' 3.62 85 498.3 17c 2.3 10%-90%/10' 5.80 95 573.2 17d 1.6 10%-90%/10' 1.60 95 525.1 17e 1.5 1%O-90/10' 2.62 95 526.3 18a 1.0 10%-90/10' 3.90 95 528.3 18b 1.2 10%-90ot/10' 5.27 95 562.3 18c 2.2 10-90%/10' 4.09 95 499.2 18d 1.5 10%-90%/10' 3.78 95 498.3 18e 1.2 10%-90%/10' 4.78 95 541.3 18f 7.1 10%-90*/10' 3.84 98 526.1 2.0 5-45t/10' 6.95 91 483.2 2Db 1.3 5-45%*/10' 7.58 99 482.2 2.5 10%-90%/10' 5.89 85 483.3 4.3 10%-90%/10' 4.09 90 471.3 3.6 10%-90%/10' 4.65 95 455.3 12.2 10%-90%/10' 3.25 95 518.3 12.1 10%-90%/10' 5.01 90 487.2 3.3 10%-90%/10' 4.30 90 533.2 5.0 10%-90%/10' 4.16 90 485.2 1.3 10%-90%/10' 3 .45 85 531.2 9.7 10%-90%/10' 5.41 90 516.2 201 3.8 10%-90%/10' 3.73 85 504.2 6 1 EX. Yield HPLC RT (min) Purity Mass Spec (mg) Gradient or S/time (min) M+Na) 6.6 101-901/10' 4.52 90 488.2 1.8 101-901/10' 2.85 90 551.2 7.0 10-S90/lO' 4.70 195 520.2 1.2 10%-90%/101 4 .00 1 95 566.2 2.3 10%-90%/101 4.93 95 481.3 3.6 101-90%/lIO' 4.45 95 519.3 3.0 10%'-901 /10' 4-18 95 552.2 6. 0 101-901/10' 3.80 90 5917.4 23a 21.0 10-60k/10' 8.11 99 495.4 23b 25.0 10-60110' 8.94 99 539.8(+Na) 23c 26.0 10-601-/10' 8.55 99 539.9(+Na) 23d 12.6 10*%-90-1io' 3.90 85 453.3 23e 8.3 101-901k/10'1 5.16 85 501.3 23f 12.5 10%-90110' 3.41 80 425.3 23g 1.5 101-901/101 3.34 85 452.3 23h 18.4 1 01c-90110' 3.84 90 451-3 231 9.0 10%-901k/10' 3.78 85 469.4 24a 1.1 10-60%/12' 8.76 90 480.5 24b 3.1 10-60*/10' 5.14 90 375.4 24c 7.2 10 -60o*110' 10.33 96 531.0 24d 3.4 10-60%/la'1 6.51 95 426.5(+Na) 24e 6.9 10-60%110' 7.22 99 455.5 1.9 5-45*1/10' 5.38 85 455.2 1.5 5-45*/10' 6.90 97 483.2 1.0 5-45. 8.09 94 497.2 12.8 5-45t/10' 5.75 851! 453.3 9.5 5-451/:L 1 7.76 90% 495.2 26a 10.2 5-45%/10' 7.36 95 455.1(+Na) 26b 1.1. 5-45%/101 7.38 89 476.3 26c 13.8 5-45k/10' 8.13 98 483.2 26d 2.3 5-45%/101 10.35 99 503.0 26e 12.8 5-45%/10' 11.11 99 523.2 26f 13.2 10 601/10' 12.11 99 545.0 26g 0.7 10 61/1 0' 10.89 87 523.2 26h 4.4 10-601/10, 11.62 99 545.8 27a 5.0 l1-9O%7Y&, 4.42 95 475.3 27b 16.4 10-60%/10' 5.20 92 505.1 27c 2.7 5-45%/10' 7.50 82 476.6(+Na) 27d 1.6 5 45T-6112 8.70 90 503.2 2e 4.4 5-45%/12' 7.80 82 489.2 27±- 1.2 J 451/12' 6.95 85 476.3 279~ 2.5 5!./121 6.67 82 510.1 27h~ 1.1 f 51-*/12' j 8.49 95 524.1 2-7i 0.9 55/12' 7.34 90 484.3 27j 14.3 [5-45%/12__1 5.77 82 470.3 62 63 N N N H 0 4 N H

H

Sh 0 HOf 0 AO 00 N 64-

HH

H 0 N N

HH

2H C0 2

H

N N 0 CO 2H 00 Sy N rnua 65 N 0 Sub

COH

0 Sac 53i N N2 00 0 I 0l 0 66 00 N C02H H

H

HH

Q 0 5an cl B0 1-4 C0 2

N

Sa 02N

NH

HH

H

0 0 0s N 0NIf H H 0 o 2 I a Sar 0d H0 2

H

H 0 C) I N

H

N't N nH I H N _(H02 N O

H

s 0 N N' Y H 0 0 i 0 N 21 67 F Sbc N NXHN j H O2H H N C 2 O O H O Sbd Procedure for the preparation of analogs 7a-7at.

Scheme II Fmoc- C2Bu-t Step3 F N7 FmooN OCBut 0 N j..O N'LR H N LR Step 4 Ri-CO2H 0 1 N H 0 0O 7 Analogs of 7a-7at were prepared as described above in Scheme I only substituting Fmoc-alanine for Fmoc-valine in Step 3 (Scheme II).

68 Step 3: A suspension of resin 3 (3.5 g, 1.75 mmol) in mL of a 20% solution of piperidine in DMF was rotated at room temperature for 5 minutes. The suspension was drained. The procedure was repeated over 20 minutes. The resin was washed successively with DMF (2 x 30 mL), CH30H (30 mL), CH 2 Cl 2 (2 x 30 mL), CH 3

OH

mL) and NMP (2 x 30 mL). To a suspension of resin in 30 mL of NMP was added successively 1.44 g of N- Fmoc-alanine (4 eq, 7.0 mmol), 2.4 mL of DIEA (8 eq, 14.0 mmol), 0.95 g of HOBt (4 eq, 7.0 mmol) and 2.66 g of HBTU (4 eq, 7.0 mmol). The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was then washed successively with DMF (2 x 30 mL), CH 3 0H (30 mL), 1:1 DMF/ CH 2 C12 (2 x 30 mL), CH 3 0H (30 mL) and

CH

2

CI

2 (3 x 30 mL), and dried in vacuo to afford resin 6 (0.50 mmol/gram).

Step 4: To a 0.125 mmol portion of resin 6 was added mL of a 20% solution of piperidine in DMF. The suspension was rotated at room temperature for minutes, and drained. The procedure was repeated over minutes. The resulting resin was washed successively with DMF (3 x 5 mL), CH 3 0H (5 mL), and NMP (3 x 5 mL). The desired carboxylic acid was then added (4 eq, 0.6 mmol), followed by 2.0 mL of a 0.25M solution of HOBt in NMP, 0.35 mL of DIEA (8 eq, mmol) and 2.0 mL of a 0.25M solution of HBTU in NMP.

The mixture was rotated at room temperature overnight and drained. The resin was washed successively with DMF (3 x 5 mL), CH 3 0H (5 mL), 1:1 DMF/ CH 2 C1 2 (2 x mL) CH 3 0H (5 mL) and CH 2 C12 (3 x 5 mL) and dried in vacuo. A 5 mL portion of a 95% solution of TFA in water was then added to the resin. The mixture was 69 stirred at room temperature for one hour, and filtered.

The filtrate was evaporated, and the residue was dissolved in acetonitrile-water and purified by preparative HPLC to afford compounds 7a-7at.

70 0A- N 2Ht 7j 0 N 2 7k 00 71 a J N 2HN N2 N 0 H HO 0N N H(H H

H

7o 7v 0 0 0 N~yI C 2 H N .J%~.NICH 4 N 0 0 O CN 0 7 p 7w N NY N2k 0 N 0H H N HN11l -i H0 H 0 N 7q 7x N ly 02HN lls N 2 0~ NOzH, H 0 F 0 7r F F y 0 N 2 Ne H N0N K N 0 2

H

N~"

os H 0z N N4

C

2 H

I

HH

NN

HiN _N N. 020 H N N 7t CI 0 7aa 0 02H 0 H- C 0 'l -C 0 2H NTNQP r u \1 0 7ab 72 'to

C

N JYN C0H k C2 HN N-Hcr' P :q H cl ~H 0c

H

HI 0

N

H H Ott

H

0 AN IY C 2

H

cl 7an H 0 73 H2 0 HO 0 N laq 0 0 HO i

H

2 N 0a I 7ar H 0 lat 0t 74 Procedure for the preparation of analogs 9a-9g.

Scheme III CO2Bu-t Fmo H

N

N'NH NNH H

OH

O0 Step 1 H2N-e

CO

2 Bu-t Fmoc,

N

NLR

.NHFmoc B -ON Step 2 C02H

,NHR

1 BooN C0Bu-t 7 "LR Step 3 NHFmoc Bo C0 2Bu-t :N H

H

"LR

6 Step 4 Step Step 1: A 10.0 g portion (0.75 mmol/gram loading, mmol) AgroPore-aminomethyl resin (catalog number 800047) was washed with DMF (3 x 40 mL), 10% DIEA/DMF (3 x 40 mL), DMF and NMP (3 x 40 mL). To above resin was added successively compound 1 (0.87 eq, 3.88 g, 6.55 mmol), HBTU (1.14 eq, 3.13 g, 8.25 mmol), HOBt 75 (1.14 eq, 1.26 g, 8.25 mmol) and NMP (40 mL) The reagents were then mixed by bubbling nitrogen through the bottom of the flask for two minutes at room temperature. N,N-diisopropylethylamine (3.33 eq, 4.35 mL, 25 mmol) was added and the resulting suspension mixed at room temperature overnight, filtered, then washed successively with NMP (3x 40 mL) and DMF (3x mL) The resin was then treated with 50 mL of a solution of acetic anhydride in DMF for 38 minutes at room temperature. The mixture was filtered, and the resin was washed successively with NMP (3x 40 mL)

CH

2 C12 (3x 40 mL), 1:1 CH 3 0H CH 2 C1 2 (3x 40 mL), and

CH

3 0H (3x 40 mL). After drying in vacuo, 13.76 grams of resin 2 were obtained (0.35 mmol/gram loading).

Step 2: Seven reaction vessels were each charged with 181 mg of resin 2 (0.48 mmol/gram, 0.063 mmol) then washed with CH 2 C12 (3 x 1 mL) and NMP (3 x 1 mL). Then each vessel was treated with 1 mL of a 25% solution of piperidine in DMF and mixed (vortex) at room temperature for 15 minutes. This procedure was repeated in triplicate. Each vessel was then washed three times with NMP (3 x 1 mL). The vessels were then treated with 500 1l of a solution of 0.4 M (2S,4R)-Fmoc-4amino-1-Boc-pyrrolidine-2-carboxylic acid /0.4 M HOBt/ NMP, 500 1l of a solution of 0.4 M HBTU/ NMP, and 250 p1 of a solution of 1.6 M DIEA/ NMP and mixed for 3 hours at room temperature. After mixing, the vessels were drained and the procedure was repeated.

Step 3:The resulting resin was washed with NMP (3 x imL) and then treated with 1 mL of a 25% solution of piperidine in DMF and mixed (vortex) at room temperature for 15 minutes. The procedure was repeated 76 in triplicate. The resulting resin was washed with NMP (3 x ImL) then treated with either acetic anhydride, or isopropyl isocyanate, or methanesulfonyl chloride, or methyl chloroformate. For acetic anhydride: add 300 pr of a 1.6 M DIEA/ NMP solution and 1 ml of a solution of M acetic anhydride/0.125 M DIEA/ 0.015 M HOBt in NMP. For isopropyl isocyanate: add 300 yl of a 1.6 M DIEA/ NMP solution and 1 mL of a solution of I M isopropyl isocyanate in NMP. For methanesulfonyl chloride: add 600 pI of a solution of 1 M pyridine in CHzCl 2 and 600 pI of a solution of IM methanesulfonyl chloride in CHZCl1. For methyl chloroformate: add 500 1l of a 1.6 M DIEA/ NMP solution and 1 mL of a solution of 0.7 M methyl chloroformate in CH 2 C1 2 The resulting suspensions were mixed for 6 hours at room temperature, the solvent drained and the coupling procedure repeated.

Step 4: The resulting resin was washed with NMP (3 x imL) then treated with a 1:1 mixture of TFA/ CH 2 C12 at room temperature for 30 minutes. The resulting resin was then washed with CH 2 C1 2 (3 x ImL) and NMP (3 x ImL). The resin was then created with 500 p1 of a solution of 0.4 M Fmoc-valine-carboxylic acid/o.4 M HOBc/ NMP, 500 1l of a solution of 0-4 M HBTU/ NMP, and 250 1p of a solution of 1.6 M DIEA/ NMP and mixed for 3 hours at room temperature. After mixing, the vessels were drained and the coupling procedure was repeated.

step 5: The resulting resin was washed with NMP (3 x imL) then treated with 1 mL of a 25% solution of piperidine in DMF and mixed (vortex) at room temperature for 15 minutes. This procedure was repeated in triplicate. The resulting resin was washed with NMP 77 (3 x ImL) then treated with either 500 pC of a solution of 0.4 M l-isoquinoline carboxylic acid/0.4 M HOBt/ NMP or 500 pl of a solution of 0.4 M p-anisic acid acid/0.4 M HOBt/ NMP. The resulting mixtures were treated with 500 1p of a solution of 0.4 M HBTU/ NMP and 250 1p of a solution of 1.6 M DIEA/ NMP then mixed for 3 hours at room temperature, the solvent drained and the procedure repeated. The resulting resin was treated with 1.5 mL of a 95% solution of TFA in water and stirred at room temperature for one hour then filtered. The filtrate was evaporated, and the residue was taken up in a 2:1:2 mixture of DMF /acetonitrile/water and purified by preparative HPLC to afford compounds 9a-9g.

78 0NH

,NH

O O r SN ,C2H I Hi 9a 9e

H

N O SO NH

O.NH

N N N O

H

Procedure for the synthesis of analogs 15-18: 79 Scheme IV

CO

2 B u-I Fmoc, H N,

LR

r o FnmoVl N Y) C0 2

H-

Step 1 Fmo,"XN

CO

2 Bu-t 0 N Fmoc NA OH 0 Step 2

R

3

CH-I

3 or CH (OH 3 2 ,.BaC

R

3 r"N' o R,00 2 H -Fmoc% kN. jf 2 Bw-t H0 Step 30N

I

11, R 3 =CH(CH3) 2 12, R 3 =CHi 3 13, R 3 =CH(CHb) 2

LR

14, R 3

=CH

3 Step 4 R3=CH(C-hJ 2 17, R 3

=CH(CH

1 3 2 16. R 3

=CH

3 18, R 3 =CH4, Preparation of analogs 15 and 16 (Scheme IV): Synthesis of -Piperazine-1i2,4-tricarboxylic acid 4-tert-butyl ester 1-O(H-fluoren-9-ylmethyl) ester.

80 To a solution of 2-(S)-piperazine tarboxylic acid (Lonza) (39, 15 mmol) in 1:1 H 2 0:dioxane (30 mL) was added a solution of (Boc) 2 C in dioxane (3.3g, S1mmol.

in 5mL dioxane) while maintaining the pH at 11 with IN NaOH The pH was maintainEd over 3 hours at room temperature. The solution was adjusted to pH9.5 with 1N HCl. cooled to O0C and treated with Fmoc-Cl (3.87g,15 mmol). The pH was maintained at 9.5 for 1 hour and the mixture stirred at room temperature overnight- The resulting suspension was filtered and the filtrate treated with IN fSO0 4 to pB 2 then extracted with ethyl acetate (2 x 75 mL). The organic layer was dried with brine and MgSo 4 filtered, and concentrated to give colorless oil. The oil was dissolved in ethyl acetate and added to hexane to give: 3.5g (51% yield) of white solid after isolation. 1H NMR (500 MHz, DMSO-d 6 6 1.55 9H) 2.80- 3.5 3H), 3.8-4.9 5H), 5.7 (bs, 1H), 7.3 2 7.3- ppm 8H), LC/MS (ES') m/e 451.3 (M-H) Step 1i To 5 g of resin 2 (0.375 mmol/gram 1.82 mmol) was added 25 mL of a 20% solution of piperidine in DMF.

The suspension was rotated at room temperature for minutes and drained- The procedure was repeated over 20 minutes. The resin was then washed successively with DMF (2 x 50 mL), CH 3 0H (50 mL) CH 2 C1 (2 x o5 mL),

CH

3 0H (50 mL) and NMP (50 mL). To a suspension of resin in 25 mL of NMP was added successively 3,5g of N- Fmoc-Boc piperazine carboxlyic acid (4 eq, 7-48 mmol),- 1.0 mL of DISA (8 eq, 14.96 mmol), 1.01 g of HOBt (4 eq, 7.48 mmol) and 2.83g of HBTU (4 eq, 7.48 mmol).

The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was then washed successively with 81 DMF (2 X 50 mL), CH 3 OH (50 mL), 1:1 DMF/ CH 2 C12 (2 x mL), CH 3 0H (I x 50 mL) and CH 2 C12 (3 x 50 mL), and briefly dried in vacuo to afford resin Step 2: To 5 g (0.335 mmol/gram loading, 1.675 mmol) of was added 25 mL of a 20% solution of piperidine in DMF. The suspension was rotated at room temperature for 5 minutes and drained. The procedure was repeated over 20 minutes. The resin was then washed successively with DMF (2 x 50 mL), CH30H (50 mL), CH 2 C1 2 (2 x 50 mL), CH 3 0H (50 mL) and NMP (2 x 50 mL). To a suspension of resin in 25 mL of NMP was added successively 2.08g of N-Fmoc-valine or N-Fmoc-alanine (4 eq, 6.7 mmol), 1.17mL of DIEA (4 eq, 6.7 mmol), 0.905 g of HOBt (4 eq, 6.7mmol) and 1.38 g of HBTU (4 eq, 3.66 mmol). The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was then washed successively with DMF (2 x 50 mL), CH 3 0H (50 mL), 1:1 DMF/ CH 2

CI

2 (2 x 50 mL), CH30H (50 mL) and

CH

2 C12 (3 x 50 mL), and dried in vacuo to afford resin 11 or 12 respectively (0.35 mmol/gram, Step 3: To a 1.5g 0.165 mmol) portion of resin 11 or 12 was added 2 mL of a 20% solution of piperidine in DMF. The suspension was rotated at room temperature for 5 minutes, and drained. The procedure was repeated over 20 minutes. The resulting resin was washed successively with DMF (3 x 15 mL), CH 3 0H (15 mL), and NMP (3 x 15 mL). The-desired carboxylic acid was then added (4 eq, 0.66 mmol), followed by 0.25g HOBt (0.66mmol), 0.12 mL of DIEA (4 eq, 0.66 mmol) and 0.89g (0.66mmol) HBTU in NMP. The mixture was rotated at room temperature overnight and drained. The resin was 82 washed successively with DMF (2 x 15 mL), CH 3 OH mL), 1:1 DMF/ CH 2 C12 (2 x 15 mL) CH 3 0H (15 mL) and

CH

2 C12 (3 x 15 mL), and dried in vacuo to afford 13 or 14.

Step 4: A 2 mL portion of a 95% solution of TFA in water was then added to the resin. The mixture was stirred at room temperature for one hour, and filtered.

The filtrate was evaporated, and the residue was taken up in acetonitrile-water and purified by preparative HPLC to afford compounds 15 and 16.

83 0oV Yr NH N N

OH

C1 o 16a 16b Procedure for the synthesis of analogs 17 and 18 (see Scheme IV): Step 5: Resin 13 or 14 was treated with 2 mL

TFA/CH

2 C1 2 for 30 min and washed with DMF (2 x 5 mL),

DIEA/CH

2 C1 2 (2 x 5 mL) DMF/CH 2 C1 2 (2 x 5 mL), CH 3

OH

mL) and CH 2 C12 (3 x 5 mL) and dried for five minutes. The resulting resin was washed with NMP (3 x 1 mL) then treated with acetic anhydride, or methoxacetic 84 acid, or 2-propanesulfonyl chloride, or isopropyl isocyanate. or methanesulfonyl chloride, or methyl chloroformate according to the procedure used to prepare analogs 9 (Scheme III)- Compounds 17 and 18 were obtained as described in Step 4 for compounds and 16.

Compounds 17a and 17b were prepared by reductive amination using Na(OAc) 3 BH and HCHO (38% in 2 zO, 0.2 mL) and CH 3 COOH (0.02 mL) prior to Step 4 and compound 18c was prepared by treatment with phosgene followed by ammonia prior to Step 4.

0 J 4 IgN2H

N

N 0 HI

H

cl cl 17a 17d

N

NN4 H H 0 N 1b

H

NX

HQX4 0 0 N N

N

HH

a18d O0 0 j N N 2 N 0 2

H

H~

0

H

0 0 Sb Ifl N Ay-% >N9 02H N NON

HH"

0 2 N( HH 0 CI 0 00 86 Procedure for the preparation of analogs Compounds 20a-20t were prepared according to the procedure described for compounds 5 (Scheme I) only substituting the appropriate Fmoc-amino acid for Fmoc- Valine in Step 3 (Scheme V).

Scheme V Fmoc-N CO2Bu- Step 3 Fmoc .N 1

CO

2 Bu-t 0 0 R3 0 H H- H H 1J S NLR FmoOH N, LR O 19 0 Preparation of 3-({1-[2-(4-amino-3-chlorobenzoylamino) -3-methylsulfonyl-propionyl] -pyrrolidine- 2-carbonyl}-amnino)-4-oxo-butyric acid A suspension of 0.132 mmol of resin 3 in 4 mL of piperidine in DMF was rotated at room temperature for minutes, and the mixture was drained. The procedure was repeated over 20 minutes. The resin was washed successively with DMF (twice), CH 3 OH (once), CH 2 C12 (twice), CH30H (once) and NMP (twicel. To a suspension of the resin in 4 mL of NMP was added successively 189 mg of N-Fmoc-methyl cysteine (4 eq, 0.528 mmol), 0.185 mL of DIEA (8 eq, 1.056 mmol), 71 mg of HOBt (4 eq, 87 0.528 mmol) and 200 mg of HBTU (4 eq, 0.528 mmol). The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was then washed successively with DMF (twice), CH 3 0H (once), and 1:1 DMF/ CH 2 C1 2 (twice), (once) and CH 2 C2 (three times), and dried in vacuo.

A suspension of 100 mg of this resin in 2 mL of piperidine in DMF was rotated at room temperature for minutes, and drained. The procedure was repeated over minutes. The resin was washed successively with DMF (twice), CH 3 OH (once), CH 2 C12 (twice), CH 3 0H (once) and NMP (twice). To a suspension of resin in 2 mL of NMP was added successively 38 mg of 4-amino-3-chlorobenzoic acid (4 eq, 0.2 mmol), 0.140 mL of DIEA (8 eq, 0.4 mmol), 27 mg of HOBt (4 eq, 0.2 mmol) and 76 mg of HBTU (4 eq, 0.4 mmol). The mixture was rotated at room temperature overnight and drained. The resin was then washed successively with DMF (twice), CH 3 OH (once), and 1:1 DMF/ CH 2 C12 (twice), CH 3 0H (once) and CH 2 C12 (three times), and dried in vacuo. The resin was then treated with 2 mL of 95% TFA in water for Ih. The suspension was filtered, the filtrate was concentrated in vacuo and purified by preparative HPLC to afford the title compound Preparation of 3-({1-[2-(3,5-dichloro-4-hydroxybenzoylamino)-4-methanesulfonyl-butyryl]-pyrrolidine-2carbonyl}-amino)-4-oxo-butyric acid Compound 20p was prepared according to the procedure used for the preparation of 20i using N-Fmoc-methionine 88 as the first component coupled to resin 3, and dichloro-4-hydroxybenzoic acid as the second component.

Preparation of (isoquinoline-l-carbonyl)amino) -3-methanesulfonyl-propionyl}-pyrrolidine-2carbonyl)-amino]-4-oxo-butyric acid N-Fmoc methyl cysteine was oxidized to the corresponding sulfone using the method of B. M. Trost and D. P. Curran, Tetrahedron Lett. 22, pp. 1287-190 (1981). To a solution of 0.714 g (2 mmol) of N-Fmoc methyl cysteine in 24 mL of a 1:1 solution of CH 3 0H water stirred at 0°C was added 3.68 g (3 eq, 6 mmol) of Oxone The mixture was stirred at room temperature for 48 h, diluted with water, acidified to pH 2 using 6N HC1, and extracted with three 100 mL portions of ethyl acetate. The combined organic extracts were dried (MgSO 4 and concentrated in vacuo to afford 0.700 g (89% yield) of sulfone: IH NMR (DMSO-d 6 500 MHz) 6 2.97 3H), 3.49-3.59 2H), 4.25 1H), 4.30- 4.38 2H), 4.46 1H), 7.33 2H), 7.42 (t, 7.70-8.00 4H); exact mass calculated for

C

19

H

1 9NO 6 S m/e 389.09, found m/e 390.2.

A suspension of 0.250 mmol of resin 3 in 10 mL of piperidine in DMF was rotated at room temperature for minutes, and the mixture was drained. The procedure was repeated over 20 minutes. The resin was washed successively with DMF (twice), CH 3 0H (once), CH 2 C12 (twice), CH 3 0H (once) and NMP (twice). To a suspension of the resin in 6 mL of NMP was added successively 200 mg of N-Fmoc-methyl cysteine sulfone (4 eq, 0.50 mmol) 0.175 mL of DIEA (8 eq, 1.00 mmol), 70 mg of HOBt (4 eq, 0.50 mmol) and 188 mg of HBTU (4 eq, 0.50 mmol) The mixture was rotated at room temperature overnight 89 and drained. This coupling procedure was repeated over 3 hours. The resin was washed successively with DMF (twice), CH 3 0H (once), 1:1 DMF/ CH 2 C1 2 (twice), CH 3 0H (once) and CH 2 C12 (three times), and dried in vacuo A suspension of 150 mg of this resin in 4 mL of piperidine in DMF was rotated at room temperature for minutes, and drained. The procedure was repeated over minutes. The resin was washed successively with DMF (twice), CH 3 0H (once), CH 2 C1 2 (twice), CH30H (once) and NMP (twice). To a suspension of resin in 3 mL of NMP was added successively 52 mg of 1isoquinolinecarboxylic acid (4 eq, 0.3 mmol), 0.104 mL of DIEA (8 eq, 0.6 mmol), 37 mg of HOBt (4 eq, 0.3 mmol) and 104 mg of HBTU (4 eq, 0.3 mmol). The mixture was rotated at room temperature overnight and drained.

The resin was washed successively with DMF (twice),

CH

3 0H (once), and 1:1 DMF/ CH 2 C12 (twice), CH 3 OH (once) and CH 2 C12 (three times), and dried in vacuo. The resin was then treated with 2 mL of 95% TFA in water for Ihour. The suspension was filtered, the filtrate was concentrated in vacuo and purified by preparative HPLC to afford the title compound Preparation of 2 -(3,5-dichloro-4-hydroxybenzoylamino)-3-methanesulfonyl-propionyl] -pyrrolidine- 2-carbonyl}-amino)-4-oxo-butyric acid Compound 20s was prepared according to the procedure used for the preparation of 20i, using 3,5-dichloro-4hydroxybenzoic acid in place of 1isoquinolinecarboxylic acid.

S0 2

CH

3 c 0c

N

H

H

CON N NQ 2 0 N H H 0 0l H 0 02CH3 N N N 02 N2

HN

SCI

C

220k Z~d

OH

00 c 0 H AN2H H H 0 HO 0 N

H

N 0 H-HC:] 0l N N N0e HH 4 c 2 1H

N

l N- COI HO N H HH CI 0 0

VNN

H 0 0 91 SO2CH3

CI

CI H HO o S02CH3 SO2CH 3 N N N C0 2

H

N

O

O N

H

Cl H O CO H2N 2H H2N Procedure for the preparation of analogs 23.

Compounds 23a-23i were prepared according to the procedure described for compounds 7 (Scheme II) only substituting the appropriate Fmoc-amino acid for Fmocproline in Step 2 (Scheme VI).

92 Scheme VI 02B-t Step 1 Fmo~lH FmoN H

NH

H H 0C2B u- Fmo c, N NH

I

N2 LR 2

F

R

4 Fmoc Ot Step 2 Fmo OH R4 Fmoc. ON N 2Bu-t H 0N

H

N

H

N

N, LR Step 3 F Fmoc N H

H

O

Step 41 R-CO2H 0

H

23 O Preparation of 3-({2-t2-(4-Amino-3-chlorobenzoylamino) -propionyl 4 -methyl 3,4-dihydro-2 Hpyrazole-3-carbonyl}-amino) -4-oxo-butyric acid (23g).

Compound 23g was prepared according to the procedure described for compounds 7 only substituting 4-methyl- 4,5-dihydro-pyrazole-1,5-dicarboxylic acid 1-(9H- 93 fluoren-9-ylmethyl) ester for Fmoc-proline (Scheme II) in Step 2.

Preparation of 4-methyl-4,5-dihydro-pyrazole-1,5dicarboxylic acid 1-(9H-fluoren-9-ylmethyl) ester: To a solution of 650 mg (2 mmol) of (10,10-dimethyl- 3,3-dioxo-X 6 -thia-4-aza-tricyclo5.2.1.0 0 ',odec-4-yl)- (4-methyl-3,4-dihydro-2H-pyrazol-3-yl)-methanone

(J.

Am. Chem. Soc., 119, pp. 8379-8380 (1997)) in 6 mL of water and 14 mL of THF stirred at 0OC was added 420 mg mmol, 5 eq) of lithium hydroxide. The mixture was stirred at 0°C for 2 hours and at room temperature for minutes, diluted with 20 mL of water and washed with ether (20 mL). The pH of the solution was then adjusted to 9, and a solution of 519 mg (2 mmol, 1 eq) of Fmoc-Cl in 3 mL of dioxane was added. The mixture was stirred at room temperature overnight, washed with ether, acidified to pH 2-3 and extracted with 3 portions of ethyl acetate. The combined organic extracts were washed with brine, dried (MgS0 4 and concentrated in vacuo to afford 690 mg (98% yield) of a colorless foam which was identified as the title compound. IH NMR (DMSO-d 6 500 MHz) 6 1.2 3H), 3.2 1H), 4.2-4.6 3H), 7.1 1H), 7.2-7.5 7.7-8.0 4H). Exact mass calculated for C 20 oHiN 2 0 4 m/e 350.13, found m/e 351.3 Preparation of 3-.({1-[2-(4-amino-3-chlorobenzoylamino) -propionyl) -4-methoxy-pyrrolidine-2carbonyl}-amino)-4-oxo-butyric acid (23i).

94 Compound 23i was prepared according to the procedure described for compounds 7 only substituting N-Fmoc-4methoxyproline for Fmoc-proline (Scheme II) in Step 2.

Preparation of N-Fmoc-4-methoxyproline: To a solution of 735 mg (3 mmol) of N-Boc-4hydroxyproline methyl ester in 20 mL of THF stirred at 0°C was added 79 mg (1.1 eq, 3.3 mmol) of 60% sodium hydride in mineral oil. The mixture was stirred at 0 C for 1 hour, and methyl iodide (0.56 mL, 3 eq, 9 mmol) was added. The mixture was stirred at room temperature overnight, quenched by addition of saturated aqueous ammonium chloride, diluted with water, and extracted with three 80mL portions of ethyl acetate. The combined organic extracts were washed with brine, dried (MgSO 4 and concentrated in vacuo to afford a pale yellow oil. The oil was taken up in 9 mL of CH 3 OH and 3 mL of water, and 378 mg (3 eq, 9 mmol) of lithium hydroxide was added. The mixture was stirred at room temperature overnight, diluted with water, acidified to pH 3 and extracted with three 80 mL portions of ethyl acetate. The combined organic extracts were washed with brine, dried (MgSO 4 and concentrated in vacuo. The residual oil was taken up in 10 mL of TFA and the solution was stirred at room temperature for 2 hours, and concentrated .in vacuo. The residual oil was diluted with 6 mL of 10% aqueous sodium carbonate and 3 mL of dioxane, and a solution of 9-fluorenylmethyl chloroformate (779 mg, leq, 3 mmol) in 5 mL of dioxane was added. The mixture was stirred at room temperature overnight, diluted with water, acidified to pH 3 and extracted with three 80 mL portions of ethyl acetate.

The combined organic extracts were washed with brine, dried (MgS0 4 and concentrated in vacuo to afford an 95 oil, which was purified by column chromatography over silica gel eluted with CH 2

CI

2 CH30H 20:1, to afford 600 mg of N-Fmoc-4-methoxyproline: exact mass calculated for C 2 1

H

2 1

NO

5 m/e 367.14 found m/e 368.4.

To a 0.125 mmol portion of resin 2 was added 4 mL of piperidine in DMF. The mixture was rotated at room temperature for 5 minutes and drained. The procedure was repeated over 20 minutes. The resin was washed successively with DMF (twice), CH 3 0H (once), CH 2 C1 2 (twice), CH 3 0H (once) and NMP (twice). To a suspension of the resin in 4 mL of NMP was added successively 184 mg of N-Fmoc-4-methoxyproline (4 eq, 0.50 mmol), 0.175 mL of DIEA (8 eq, 1.00 mmol), 70 mg of HOBt (4 eq, 0.50 mmol) and 188 mg of HBTU (4 eq, 0.50 mmol). The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was washed successively with DMF (twice), CH 3 0H (once), 1:1 DMF/ CH 2 C1 2 (twice), CH 3 0H (once) and CH 2

CI

2 (three times), and dried in vacuo.

To the resin was added 4 mL of 20% piperidine in DMF.

The mixture was rotated at room temperature for minutes and drained. The procedure was repeated over minutes. The resin was washed successively with DMF (twice), CH30H (once), CH 2 C1 2 (twice), CH 3 0H (once) and NMP (twice) To a suspension of the resin in 4 mL of NMP was added successively 156 mg of N-Fmoc-alanine (4 eq, 0.50 mmol), 0.175 -mL of DIEA (8 eq, 1.00 mmol), mg of HOBt (4 eq, 0.50 mmol) and 188 mg of HBTU (4 eq, 0.50 mmol). The mixture was rotated at room temperature overnight and drained. This coupling procedure was repeated over 3 hours. The resin was 96 washed successively with DMF (twice), CH30OH (once), 1:1 DMF/ CH 2 C1 2 (twice), CH 3 OH (once) and CH 2 CI-, (three times), and dried in vacuo.

To the resin was added 4 mL of 20% piperidine in DMF.

The mixture was rotated at room temperature for minutes and drained. The procedure was repeated over minutes. The resin was washed successively with DMF (twice), CH 3 OH (once), CH 2 C1 2 (twice), CH 3 0H (once) and NMP (twice). To a suspension of the resin in 4 mL of NMP was added successively 80 mg of 4-amino-3chlorobenzoic acid (4 eq, 0.50 mmol), 0.175 mL of DIEA (8 eq, 1.00 mmol), 70 mg of HOBt (4 eq, 0.50 mmol) and 188 mg of HBTU (4 eq, 0.50 mmol). The mixture was rotated at room temperature overnight and drained. The resin was washed successively with DMF (twice), CH 3 0H (once), 1:1 DMF/ CH 2 C12 (twice), CH 3 0H (once) and CH 2 C12 (three times), and dried in vacuo.

The resin was treated with 4 mL of 95% TFA in water for 1 hour. The mixture was filtered. The filtrate was concentrated in vacuo to afford an oil, which was purified by HPLC to afford the title compound (23i).

97 23 0 N OH HO

H

2 1 3 23b

H

N .rf'y Nvj"7 CO2H H 0

H

2 NJ? 05 N' CI

H

0 Procedure for the preparation of analogs 24a-e.

Compounds 24a-24e were prepared according to the procedure described for compounds 5 (Scheme I) only substituting either Fmoc-azetidine carboxylic acid or 98 trans-2-phenyl- Fmoc-azetidine carboxylic acid for Fmoc-proline in Step 2.

0 Ph N l N 0 CO2H

H

H

24a H2NH 24b

O

0 N N C 0 2H 2 24d Procedure for the preparation of analogs Compounds 25a-25e were prepared according to the procedures described for compounds 5 and 7 (Scheme I and Scheme II) only substituting Fmoc-2(S)-pipecolic acid for Fmoc-proline in Step 2 and coupling either Fmoc-valine or Fmoc-alanine or Fmoc-tert-leucine in Step 3.

99 H H O O i H H 0 IN N ON 2H 0 CI 0 N Procedure for the preparation of analogs 26a-h.

Compounds 26a- 26h were prepared according to the procedure described for compounds 23 (Scheme VI) only substituting Fmoc-valine for Fmoc-alanine in Step 3.

100 SN N CO 2

H

26a H 0 26f 0 N l 26g H N N H SH 0 2

H

0O OH 26h 0 N N 0 2

H

H Y

H

N0 N H 26e

O

Procedure for the preparation of analogs 27.

101 Compounds 27a- 27n were prepared according to the procedure described for compounds 7 (Scheme II) only substituting Fmoc-4,4-difluoroproline for Fmoc-proline in Step 2.

Preparation of N-Boc 4,4-difluoroproline methyl ester: To a solution of 9.63 mL (7.2 mmol) of oxalyl chloride in 10.6 mL of CH 2 C1 2 stirred at -78 °C was added a solution of 0.94 mL (13.2 mmol) of methyl sulfoxide in 15 mL of CH 2 C1 2 The solution was stirred at -78 OC for min. A solution of 1.47 g (6 mmol) of N-Boc-4hydroxyproline methyl ester in 19 mL of CH 2 C12 was then added dropwise. The mixture was stirred at -78 0 C for h, and 3.34 mL (24 mmol) of triethylamine was added. The solution was allowed to warm up to room temperature and stirred overnight. It was then diluted with 100 mL of CH 2 C1 2 washed successively with 100 mL of water, 100 mL of IN HC1, and 100 mL of brine, dried (MgSO 4 and concentrated in vacuo. The residue was purified by column chromatography over silica gel (eluted with ethyl acetate/hexanes, to afford 1.294 g (89% yield) of N-Boc-4-oxo-proline methyl ester. H NMR (500 MHz, CDC13) 6 1.45 9H), 2.60 (m, 1H), 2.95 1H), 3.75 3H), 3.90 2H), 4.80 (m, 1H).

To a solution of 808 mg (3.33 mmol) of N-Boc-4-oxoproline methyl ester in 13 mL of CH 2 Cl 2 stirred at 0°

C

was added 0.88 mL (7.19 mmol, 2.2 eg) of DAST. The mixture was stirred at OOC for 2 hours, at room temperature for 16 hours, and poured into ice water.

The mixture was stirred at room temperature for 2 hours. The organic phase was separated, washed with water, dried (MgSO 4 and concentrated in vacuo. The 102 residue was purified by column chromatography over silica gel (eluted with ethyl acetate-hexanes, to afford 754 mg (79% yield) of difluorinated derivative as a pale yellow oil. IH NMR (500 MHz, CDC1 3 6 1.50 (m, 9H), 2.45 1H), 2.70 1H), 3.75 3H), 3.80 (m, 2H), 4.50 1H).

Preparation of N-Fmoc-4,4-difluoroproline: To a solution of 754 mg (2.85 mmol) of N-Boc 4,4difluoroproline methyl ester in 5 mL of THF stirred at o°C was added a solution of 179 mg (4.27 mmol) of lithium hydroxide in 5 mL of water. The solution was stirred at 0°C for 3 h, at room temperature for 1 hour, diluted with water, extracted with ether, acidified to pH 2-3, and extracted with two 30 mL portions of ethyl acetate. The combined organic extracts were washed with brine, dried (MgSO 4 and concentrated in vacuo to afford 652 mg of acid as a pale yellow solid.

A solution of 652 mg (2 mmol) of N-Boc-4,4difluoroproline in 10 mL of i;i TFA/ CH 2 C12 was stirred at 0°C for 45 min, and concentrated in vacuo. The residue was taken up in 3 mL of dioxane, and 5 mL of aqueous sodium carbonate was added, followed by a solution of 675 mg (1 eq) of Fmoc-Cl in 5 mL of dioxane. The mixture was stirred at room temperature for 16 h, diluted with 20 mL of water, extracted with 2 portions of diethyl ether, acidified to pH 2, and extracted with three 30-mL portions of ethyl acetate.

The combined organic extracts were washed with 50 mL of brine, dried (MgS04) and concentrated in vacuo. The residue was purified by column chromatography over silica gel (eluted with CH 2 C12/ CH 3 0H 10:1), to afford 850 mg of N-Fmoc-4,4-difluoroproline as a

I

103 brownish solid. 'H NMR (500 MHz, CDC1 3 62.55 Cm,' 1H) 2. 95 (in, 11) 3. 80 (in, 2H) 4 .2 0 1R), 4 .30 (mn, 211), 4. 55 (mn, 11) 7.232 (mn, 2H), 7. 45 2H), 7. 70 2 H), 7.90 2H1). Exact mass calculated for C 2 0

H

1 7

F

2 N0 4 m/e 373.12, found m/e 374.4.

104 27a 27h 0 F F 0 N N J N ~H 0 27 H

HN

H H J; Cl 0 27b 27i F

N

H 0 0 N HO 27c 273

N

H

H

H

2 N N) S H H 27: H 0 27d 27k 0SN)t NjF72H k0Nl H N H

H

2 N N0 0 27m 105 Compounds 28a- 28c were prepared according to the procedure described for compounds 5 and 7 (Scheme I and Scheme II) only substituting Fmoc-dimethylthioproline for Fmoc-proline in Step 2.

0 0 H 00 H X NO

H

H 0~ N O H 28a, X=N 28c 28b, X=C GENERAL PROCEDURES FOR THE PREPARATION OF COMPOUNDS OF EMBODIMENT A FORMULA I (SCHEMES VII-VIII) Compounds of Embodiment A Formula I where R 4 =H and one

R

5

=H:

Procedure for the preparation of analogs 29.

Compounds 29a- 29s were prepared according to the procedure described for compounds 5 (Scheme I) only substituting Fmoc-alanine for Fmoc-proline in Step 2 and using either Fmoc-valine or Fmoc-alanine or Fmoctert-leucine in Step 3.

106 29a 29g o

CO

2

H

N C NH H 0 29i 0

CO

2

H

H

NH

29i 107 0 0

CO

2

H

N H H O 0 -0 29m

H

2 N- CI 29q H N 0 H H2N CI 29r

CO

2

H

N 29s 29s Procedure for the preparation of analogs 32.

Compounds 32a-32e were prepared according to the procedure described for compounds 5 (Scheme I) only substituting 2-(3-tert-butoxycarbonylamino-2-oxopyrrolidin-l-yl)-4-methyl-pentanoic acid (Neosystem catalog number BB02101)for Fmoc-proline in Step 2 followed by Step 4 (Scheme VII).

1o8 compounds of Embodiment A Formula I wherein R 2 and R 3 together with the atoms to which they are bound form a membered ring.

Scheme VII Fmoc_

N

H

1 Step I H28 C2Bu-t Fmoc..A

NLR

BOCNt~t.

Step 2 Rp N" CH H 0 _q

Z.

0 N H 0 R1-002H Step 4 Bocw%N)K(2Bt 0 Z N,

LR

109 m-1 Q -r i N 0U N 0NX2H 7 NN C02H 0 H 0 02 Hl 32a 320 N NI~f2 N$~N 1 1 i'x, C 2

H

HO NCI

H'

4 32b 32e0 I N I %7N 0O2H N 00 H

O

32c 0 Compound of Embodiment A Formula I wherein X=N-CH 3 110 Scheme VIl Step 3 1 3 N 3 COrBu-t HN ^NCOr0- Fmoc' N 1) 20% COCI2/Tol H2 N N O- H

O

O 2) CH--N 2 O H 3 LR 33'

NLR

CO2H Step4

N

S 0 CH NN N

COH

N 0 H 0 34 Preparation of (isoquinoline-1-carbonyl)

-N-

methyl-hydrazinocarbonyl] -pyrrolidine-2 -carbonyl}amino)-4-oxo-butyric acid (34).

A suspension of 0.250 mmol of resin 3 (Scheme VIII) in 10 mL of 20% piperidine in DMF was rotated at room temperature for 5 minutes and drained. The procedure was repeated over 20 minuces. The resin was washed successively with DMF (twice), CHOH (once), 1:1 DMF/ CHC1, (twice), CH 3 OH (once) and CHtCL, (three times), and briefly dried. To the resin was added 5 mL of dry

CH

2 C1,, 0.128 mL of DIEA (3eq, 0.75 mmol) and 0.400 mL of a 20% solution of phosgene in toluene (3 eq, 0.75 mmol). The suspension was rotated at room temperature for 1.5 hours. The mixture was drained, and the resin was washed with CH,C1 2 several times. To a suspension of resin in 5 mL of CHC1, was added 0.133 mL of methyl hydrazine (10 eq, 2.5 mmol). The mixture was rotated at room temperature overnight and drained. The resin 111 was washed successively with DMF (twice), CH 3 0H (once), 1:1 DMF/ CH 2 C12 (twice), CH 3 0H (once) and CH 2 C12 (three times), and dried in vacuo.

To a 0.075 mmol portion of the resin in 3 mL of NMP was added successively 52 mg of 1-isoquinolinecarboxylic acid (4 eq, 0.3 mmol), 0.19 mL of DIEA (8 eq, 0.6 mmol), 37mg of HOBt (4 eq, 0.3 mmol) and 104 mg of HBTU (4 eq, 0.3 mmol). The mixture was rotated at room temperature overnight and drained. The resin was washed successively with DMF (twice), CH 3 0H (once), 1:1 DMF/ CH2C1 2 (twice), CH 3 0H (once) and CH 2 C1 2 (three times), and dried in vacuo.

The resin was treated with 4 mL of 95% TFA in water for 1 hour. The mixture was filtered. The filtrate was concentrated in vacuo to afford an oil, which was purified by.HPLC to afford the title compound (34).

Compounds of Embodiment A Formula I wherein R 3

R

3

H:

O

N CO 2

H

H

2 N C? C) N H C H 0 G1 3-({l-[(4-Amino-3-chloro-benzoylamino)-acetyl]pyrrolidine-2-carbonyl}-amino)-4-oxo-butyric acid (GI).

Prepared as described for compounds 7 only substituting Fmoc-glycine for Fmoc-alanine in Step 3 (Scheme II) to afford 4.3mg of the title compound. LC-MS (ES') m/e=425.2 (M+H) 112

F

O F SN

CO

2

H

H O H

H

2 0 N CI H 0 G2 3- [(4-Amino-3-chloro-benzoylamino) -acetyl] -4,4difluoro-pyrrolidine-2-carbonyl} -amino) -4-oxo-butyric acid (G2).

Prepared as described for compounds 7 and 27 only substituting Fmoc-glycine for Fmoc-alanine in Step 3 (Scheme II) to afford 10.0mg of the title compound. LC- MS (ES m/e=461.2 (M+H) 113 GENERAL PROCEDURES FOR THE PREPARATION OF COMPOUNDS OF EMBODIMENT C FORMULA I AND EMBODIMENT D FORMULA I WHEREIN Y= C (SCHEMES IX-XXII) Scheme IX Route A H2N 4

EDC

EDC

R3 R31 R o OH R4 3 R3 Rs o

ORN

0 R8

TFA

R.4 R s' R 1 Rs O N H R 8 RtCO2H

EDC

R4 R8 Route B 1) H2 2) EDC, R 1

CO

2

H

H2NE

EDC

R R R R 5 D R4 R R3" RS

OOH

114 Sources for Selected Ring Systems Structure Reference I/ IBlythin, J. Orq. Chem., 59, L, !pp. 6098-6100 (1994).

N

CO

2

R

O

'N iDecicco, C.P. et al., Syn. Lett., YNN !pp. 615-616, (1995).

o COR Bennion, C. et al., J. Med. Chem., N 34, pp. 439-447 (1991); CO IJensen, K.A. et al., Acta Chemica iScand., 13, pp. 1097-1103 (1961).

S: commercially available r 0 C02R N- R Mish, M. J. Am. Chem. Soc., /N CO119, pp. 8379-8380 (1997).

COzR N Xi, N. et al., J. Am. Chem. Soc., ,N p 120 pp. 80-86 (1998).

CO

2

R

115 Structure Reference N Merour, J.Y. et al., Tetrahedron :Lett., 32, pp. 2469-2470 (1991); CO2 !Rossen, Tetrahedron Lett., 36, !pp. 6419-6422 (1995).

Scheme X Fmoc, N' C

H

HN

HCO Et polyvinyl pyridine toluene Fmo Bu-t RA N 39, R=CH 3 44, R=4-MeOPh- 1N NaOH MeOH 0 R'-k 38, R=CH 3 43, R=4-MeOPh-

O

Pd(Ph 3

P)

4 S ,Alloc~ DMBA N

CH

2 CIt DMF H C 0'

RN

H

0

RAN

HR N

H

41. R=CH 3 R=4-MeOPh- 42, R=CH 3 46, R=4-MeOPh- 116 5-tert-Butyl-3- (H-fluoren-9ylmethoxycarbonylamino) -3-methyl butyryl] 3-dihydro- I1,3,4]thiadiazole-2-carboxylic acid ethyl ester (37).

A stirred suspension of polyvinylpyridine (2.63g, in a solution of 5-tert-butyl-2,3-dihydro- [1,3,4]thiadiazole-2-carboxylic acid ethyl ester (36), Med. Chem., 34, p. 439 (1991)), (2.16g, 10mmol) in dry toluene was treated with the dropwise addition of (l-chlorocarbonyl-2-methyl-propyl) -carbamic acid 9Hfluoren-9-ylmethyl ester (4.76g, 12.1mmol) in 20mL of anhydrous toluene. After stirring for 16 hours, the suspension was filtered and the filtrate was washed with saturated sodium bicarbonate solution. The organic layer was separated, washed with water, dried over anhydrous sodium sulfate, and evaporated to give a yellow oil. Purification by flash chromatography eluting with 9/1 hexane/ ethyl acetate gave 2.66 g (49% yield) of the title compound (37) as a clear, viscous oil. IH NMR (500MHz, CD 3 0D) 6 0.89(d, 1.5H), 0.93 (d, 1.00 1.5H), 1.06 1.5H), 1.22 3H), 1.28 9H), 2.12-2.22 0.5H), 2.32-2.42 4.18-4.28 2H), 4.31-4.45 2H), 4.96-5.01 (m, 5.02-5.10 0.5H), 5.52 0.5H), 5.61 (d, 0.5H), 6.10 0.5H), 6.13 0.5H), 7.27-7.34 (m, 2H), 7.35-7.42 2H), 7.56-7.64 2H), 7.73-7.78 2H).

3-(2-Acetylamino-3-methylbutyryl)-5-tert-butyl-2,3dihydro-[1,2,4] thiadiazole-2-carboxylic acid ethyl ester (38).

To a solution of (37) (Scheme IX) (0.508g, 0.94 mmol)in

CH

3 CN (10 mL) was added diethylamine (1 mL). The solution was stirred at room temperature for 2 hours, 117 the solvent removed in vacuo and the resultant oil azeotroped with CH 2 C12 The crude oil was dissolved in CH:Cl (5 mL) and triethylamine (0.26mL, 1.86mmol) and acetyl chloride (8041, l.lmmol) were added. The solution was stirred at room temperature under an N 2 atmosphere for 2 hours. The solvent was evaporated, and the crude material dissolved in EtOAc and washed with 0.5N NaHS0 4 saturated NaHCO 3 (2x) and brine and was dried over anhydrous Na 2

SO

4 filtered and evaporated to give a yellow oil. Purification by flash column chromatography on silica gel using hexanes/EtOAc (95/5 to 90/10%) yielded the product as a yellow oil (0.301g, 89% yield). 1 H-NMR (500MHz, CDCl 3 6 0.88 (dd, 3H), 0.99 (dd, 3H), 1.16-1.45 12H) 2.02 3H), 2.09-2.19 0.5H), 2.30-2.40 4.12-4.29 2H), 5.20-5.27 0.5H), 5.30-5.36 (m, 6.60(s, 0.5H), 6.90 0.5H), 6.20-6.31 (m, 1H). Analytical HPLC (C18 column), (mixture of diastereomers) 7.77, 7.98min. LC-MS m/e=358.3 3-( 2 -Acetylamino-3-methylbutyryl)-5-tert-butyl-2,3dihydro-[1,2,4]thiadiazole-2-carboxylic acid (39).

To a solution of 38 (0.301g, 0.84mmol) in MeOH was added IN NaOH solution (1.7mL, 1.7mmol) The reaction was stirred at room temperature for 2 hours and solvent was evaporated. The residue was dissolved in EtOAc and washed with 0.5N NaHSO 4 (2x) and brine and was dried over anhydrous Na 2

SO

4 filtered and evaporated to give the title compound as a yellow solid (0.277g, quantitative).

Preparation of 2-(Benzyloxy-5-oxo-tetrahydro-furan-3yl)-carbamic acid allyl ester 118 Compound 40 was prepared from 3-allyloxycarbonylamino- 4-hydroxy-butyric acid tert-butyl ester by a modification of the procedure described in Bioorq. Med.

Chem. Lett. Vol. 2, No. 6, pp. 613-618, (1992).

To a solution of DMSO (27.52 g, 352 mmol) in CH 2

CI

2 (240 mL) at -780C was added oxalyl chloride (24.4 g, 192 mmol).. After 15 min, a solution of 3allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester (41.44 g, 160 mmol) in CH 2

CI

2 (100 mL) was slowly added and the mixture was stirred at -780C for an additional 1.5 hours. DIEA (62.0 g, 480 mmol) was added and the mixture allowed to warm to room temperature for 15 min. The resulting solution was diluted with CH 2 C12 (300 mL), washed with 0.5 N NaHSO 4 (500 mL x water (300 mL x and brine (400 mL x The organic layer was dried over anhydrous Na 2

SO

4 filtered and concentrated in vacuo to 200mL volume. To this solution was added, benzyl alcohol (48 g, 444 mmol), followed by 3A molecular sieves (30 g) and ptoluenesufonic acid (0.8 The reaction mixture was allowed to stir for 4 days and TFA (96 mL) was added.

The resulting suspension was stirred for one hour then evaporated in vacuo. Ethyl acetate (500 mL) was added and the mixture was filtered through Celite. The filtrate was washed with saturated NaHCO 3 (500 mL x 2), water (400 mL x and brine (300 mL x 2) The organic solution was dried over anhydrous Na 2

SO

4 filtered and evaporated in vacuo to give 90 g of pale yellow oil, which was stirred with hexane (400 mL x 2) to give 31 g of crude product from the lower layer residue. Chromatography using ethyl acetate/hexane (4/96 to 22/78) afforded 6.97 g of anti-2- oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester 119 (higher Rf), 4.53 g of syn diastereomer and 12.97 g of the mixture of the diastereomers (overall yield 53%).

H-NMR (500 MHz, CDC1 3 for anti diastereomer: 6 2.41- 2.45 3.02-3.07 4.28 (br, 4.50-4.80 3H), 4.80-5.15 2H), 5.24-5.32 2H), 5.48 (s, 5.88-6.00 7.31-7.56 5H); for syn diastereomer: 62.49-2.53 2.83-2.89

H),

4.57-4.65 4H), 4.87-4.90 5.12-5.30 3H), 5.52-5.53 5.88-6.00 7.31-7.39 retention time on analytical HPLC: 10.49 min for anti diastereomer and 10.37 min for syn diastereomer;

LC-MS:

m/z 292 (M+H 4 3- 2 -Acetylamino-3-methylbutyryl)-5-tert-butyl-2,3dihydro- thiadiazole-2-carboxylic acid (2benzyloxy-5-oxo-tetrahydrofuran-3-yl) -amide (41).

To a solution of (2-benzyloxy-5-oxo-tetrahydrofuran-3yl)-carbamic acid allyl ester (40) (0.385g, 1.32mmol) in DMF (2ml) and CH 2 C1 2 (2ml) was added DMBA (0.456g, 2.92mmol) and Pd(PPh 3 4 (0.136g, 0.12mmol) and the solution was stirred at room temperature for 15min. A solution of (39) in CH 2 C1 2 (4.5ml) and DMF (0.5ml) was added, followed by HOBT (0.168g, 1.24mmol) and EDC (0.256g, 1.33mmol). The reaction was stirred at room temperature for 18hours under N 2 The solvent was evaporated. The crude material was dissolved in EtOAc and washed with 0.5N NaHSO 4 saturated NaHC0 3 (2x) and brine and was dried over anhydrous Na 2

SO

4 filtered and evaporated to give- a yellow solid. Purification by flash column chromatography gave the title compound (41) as a mixture of diastereomers (374mg, 88% yield) iH-KTMR (500MHz, CDC13) 6 0.75-1.05 6H), 1.19-1.34 9H) 1.93-2.08 3H), 2.19-2.50 2H), 2.80- -120 3.03 1H), 4.56-4.93 3H), 5.02-5.20 1H), 5.46-5.56 1H), 5.95-6.16 2H), 6.86-6.95 (m, 1H), 7.20-7.43 5H). Analytical HPLC (C18 column),(mixture of diastereomers) 8.58min. LC-MS (ES m/e=519.2 Preparation of [3-(2-acetylamino-3-methyl-butyryl)- 5-tert-butyl-2,3-dihydro-[1,3,4]thiadiazole-2carbonyl]-amino}-4-oxo-butyric acid (42).

A 45 mg (0.087mmol) sample of 41 was hydrolyzed according to method A (see Scheme XXIII) to give 17 mg yield) of the title compound. Analytical HPLC (C18 column): 5.15min. LC-MS (ES m/e=429.3 5-tert-Butyl-3- (4-methoxy-benzoylamino) 3-methylbutyryll -2,3-dihydro- thiadiazole-2-carboxylic acid ethyl ester Was prepared by the method reported above for compound 38 using anisoyl chloride to give 216mg of the title compound as an amorphous solid. 1 H NMR (500 MHz, CDC13) 6 0.92 1.5H), 0.98 1.5H), 1.03 1.07 1.5H), 1.21 3H), 1.28 2.21-2.28 0.5H), 2.41-2.48 0.5H), 3.83 3H), 4.15-4.28 2H), 5.41-5.46 0.5H), 5.48-5.53 0.5H), 6.08 0.5H), 6.13 0.5H), 6.75 0.5H), 6.85 (d, 6.91 2H), 7.59 2H).

5-tert-Butyl-3- (4-methoxy-benzoylamino) -3-methylbutyryl] -2,3-dihydro- [1,3,4]thiadiazole-2-carboxylic acid (44).

Prepared by the procedure described for 39 to give 180mg (quantitative) of the title compound as a white solid. H NMR (500 MHz, CDC13) 60.92 1.5H), 0.96 1.5H), 1.03 1.5H) 1.07 1.5H) 2.22-2.30 121 0.5H), 2.37-2.45 0.5H), 3.83 1.5H) 3.84 (s, 5.41-5.48 1H) 6.14 0.5H), 6.15 (s, 6.87-6.95 2H), 7.75-7.83 3H).

5-tert-Butyl-3-[2-(4-methoxy-benzoylamino)-3-methylbutyryll-2,3-dihydro-[1,3,4]thiadiazole-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3-yl)-amide and Was prepared by the procedure reported for compound 41 to give the crude title compound as 4 diastereomers.

The crude material was purified by flash chromatography, eluting with a gradient of CH 2 C1 2 to

CH

2 Cl 2 /ethyl acetate to give 31mg of the higher Rf component as a single diastereomer (45a). Analytical HPLC (Microsorb C18 column) 19.87 min. H NMR (500 MHz, CDC13) (single diastereomer) 6 1.04 (d,3H),1.14 (d, 3H), 1.28 9H), 2.77 0.5H), 2.81 0.5H), 2.90 0.5H), 2.95 0.5H), 3.84 3H), 4.44-4.49 (m, 1H), 4.53 1H), 4.85 1H), 5.02-5.08 1H), 6.37 1H), 6-.41 1H), 6.93 2H), 7.26-7.40 (m, 7.75 2H), 7.92-7.96 1H).

The lower Rf fraction contained 185mg of a solid as a 3:1:2 mixture of diastereomers (45b). Analytical HPLC: Microsorb C18 column. 19.00, 19.26, 20.02 mins, 1H NMR (500 MHz, CDC1 3 (3:1:2 mixture of 3 diastereomers) 6 0.89 2.25 0.98 0.75H), 1.02 1.03 1.5H), 1.08 0.25H), 1.10 0.75H), 1.16 0.75H), 1.17 2.25H), 1.23 0.375H), 1.24 (s, 1.125H), 1.28 2.125 1.29 3.375H), 2.12-2.18 0.33H), 2.32-2.42 0.67H), 2.43-2.51 2.61-2.67 0.5H), 2.84-2.92 0.5H), 2.96-3.07 (m, 3.85 3H), 4.58-4.71 2H), 4.81 (d, 122 0.16H), 4.86 0.32H), 4.91 0.52H), 5.09-5.13 (m, 0.33H), 5.14-5.18 0.67H), 5.35 (dd, 1H), 5.46 (s, 0.16H), 5.53 0.32H), 5.58-5.62 0.52H), 6.17 (s, 0.52H), 6.20 0.16H), 6.34 0.32H), 6.50 (d, 0.32H), 6.62 0.16H), 6.67 0.52H), 6.86 (d, 0.33H), 6.91 0.67H), 6.94 1.0H), 7.24-7.43 5H), 7.61 1H), 7.70 0.33H), 7.71 (d, 0.67H), 7.76 1H).

Preparation of 3- ((5-tert-butyl-3-[2-(4-methoxybenzoylamino) -3-methyl-butyryl] -2,3-dihydrothiadiazole-2-carbonyl}-amino) -4-oxo-butyric acid (46a).

A 30mg sample of 45a was hydrolyzed according to method B (see Scheme XXIII) to give 8mg (30% yield) of the desired product. Analytical HPLC (Microsorb C-18 column, acetonitrile/ water, with TFA buffer) 12.85min, 1H NMR (500 MHz, CD 3 0D) 5 0.98-1.1 6H), 1.28 (s, 9H), 2.20-2.31 1H), 2.40-2.48 1H), 2.6-2.72 (m, 1H) 3.84 3H), 4.18-4.26 1H), 4.56-4.62 (m, 1H), 5.25-5.32 1H), 6.24-6.28 1H), 6.98 (d, 2H), 7.85 2H).

Preparation of 3-({5-tert-butyl-3-[2-(4-methoxybenzoylamino) -3-methyl-butyryl] -2,3-dihydro- 3,4]thiadiazole-2-carbonyl)-amino) 4-oxo-butyric acid (46b).

A 30mg sample of 45b (mixture of 3 diastereomers) was hydrolyzed according to method B (see Scheme XXIII) to give 22mg (84% yield) of the desired product as a 3:2 mixture of diastereomers. Analytical HPLC (Microsorb cyano column) 7.08, 7.78min. H NMR (500MHz, CD 3 0D) 6 0.98-1.08 4H) 1.09-1.12 2H), 1.29 1.31 (2 singlets, 9H) 2.23-2.30 2.36-2.55 (m, 123 2.62-2.72 1H), 3.85 3H), 4.18-4.27 (m, 1H), 4.58-4.65 1H), 5.27-5.33 1H), 6.23-6.27 1H), 7.00 2H), 7.70-7.88 2H) Scheme XI HN9 C0 2 Bu-t 47 o o O C02Bu-t 48 49 0 NX N O CO 2 Bu-t 1- (2-Benzyloxycarbonylamino-2-methyl-propionyl) pyrrolidine-2-carboxylic acid tert-butyl ester (49).

To a solution of proline-tert-butyl ester (47) (2.00g, 12mmol, in CH 2 C1 2 (15ml) was added N-carbobenzyloxy-2methylalanine (3.05g, 13mmol), HOBT (2.36g, 17mmol) and EDC (3.43g, 18mmol) and the solution was stirred at room temperature under N 2 for 48hours. The solvent was evaporated, the crude material dissolved in EtOAc and 124 washed with 0.5N NaHSO 4 saturated NaHCO 3 (2x) and brine and was dried over anhydrous Na 2

SO

4 filtered and evaporated to give a white solid (4.68g, 100%). 1

H-NMR

(500MHz, CDC13) 6 1.20-2.15 4H), 1.43 9H) 1.59 6H), 3.21-3.79 2H), 4.35 (br s, 1H), 4.82-5.19 3H), 5.74 (br s, 1H), 7.17-7.49 5H). Analytical HPLC (C18 column) 10.66min. LC-MS (ES m/e= 391.3 1- (4-Methoxy-benzoylamino)-2-methyl-propionyl] pyrrolidine-2-carboxylic acid tert-butyl ester To solution of 49 (1.00g, 2.56mmol) in MeOH (20ml) was added 10% Pd/C (200mg) and the mixture was stirred under H 2 for 2 hours. The mixture was filtered through a 0.45gm PTFE filter and the solvent removed in vacuo to yield a colorless oil. This oil was dissolved in

CH

2 C1 2 (25mL) and DIEA (660g4, 3.79mmol) and p-anisoyl chloride (480mg, 2.8mmol) were added. The.solution was stirred at room temperature under N 2 for 18hours. The solvent was removed in vacuo and the oil dissolved in EtOAc. The organic phase was washed with 0.5N NaHSO 4 water, saturated NaHC03 (2x) and brine. The organic phase was dried over Na 2

SO

4 filtered and evaporated to give a white solid which was purified by flash column chromatography, eluting with CH 2 C12/MeOH (99/1 to 98/2%) to give the title compound as a white solid (655mg, 65% yield). 1 H-NMR (500MHz, CDC1 3 6 1.47 9H), 1.68-2.24 5H), 1.80 6H), 3.55-3.68 (m, 1H), 3.72-3.93 1H), 3.84 3H) 4.43-4.55 (m, 1H), 6.90 2H), 7.60 (br s, 1H), 7.77 2H) Analytical HPLC (C18 column)8.98min.

125 1-[2-(4-Methoxy-benzoylamino)-2-methyl-propionyl]pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (51).

To a solution of 50 (325mg, 0.83mmol) in dioxane was added triethylamine 463 p 1 3.32mmol) and TMStriflate 6 42pl, 3.32mmol) and the solution was stirred at 100 C for 5 hours, then at room temperature for 18 hours. The reaction was diluted with water, adjusted to pH 8 with saturated NaHC0 3 and extracted with Et 2 0, dried over Na 2 S04, filtered and evaporated to give a white solid (230mg, 83% yield) which was used directly in the next step.

To a solution of 2 -benzyloxy-5-oxo-tetrahydrofuran-3yl)-carbamic acid allyl ester (40) (1.027g, 3.5mmol) in

CH

2

CI

2 (20ml) was added DMBA (543mg, 3.48mmol) and Pd(PPh 3 4 (280mg, 0.24mmol) and the solution was stirred at room temperature under N 2 for 20 minutes. A solution of 1-[2-(4-methoxy-benzoylamino)-2-methyl-propionyllpyrrolidine-2-carboxylic acid (818mg, 2.45mmol) in

CH

2 C1 2 (5ml) was added, followed by HOBT (0.534g, 3.95mmol) and EDC (738mg, 3.84mmol). The reaction was stirred at room temperature for 18 hours under N 2 The solvent was evaporated, the crude material dissolved in EtOAc and washed with 0.SN NaHS0 4 saturated NaHCO 3 (2x) and brine and was dried over anhydrous Na 2 S04, filtered and evaporated to give a yellow solid.

Purification by flash column chromatography, eluting with ethyl acetate/hexanes (20/80 to 50/50%), gave the product as pale yellow solid (760mg, 61% yield). IH- NMR (500MHz, CD 3 0D) 5 1.53 6H), 1.65-1.93 3H), 1.96-2.14 1H), 2.60 (dd, 0.1H), 2.77 (dd, 0.85H), 2.94 (dd, 0.85H), 3.04-3.11 0.2H), 3.42-3.52 (m, 1H), 3.57-3.67 1H), 3.84 3H), 4.38-4.76 (m, 126 3H), 4.84 1H) 5.64-5.70 1H), 6.96-7.03 (m, 2H) 7.23-7.43 5H), 7.78-7.97 2H) Analytical HPLC (C18 column) 13.32, 14.37min. LC-MS (ES m/e=524.3 Preparation of 3-({1-[2-(4-methoxy-benzoylamino)-2methyl-propionyl] -pyrrolidine-2-carbonyl -amino) -4-oxobutyric acid (52).

A 61mg (0.14mmole) sample of 51 was hydrolyzed according to method C (see Scheme XXIII) to afford yield) of the title compound: Analytical HPLC (C18 column) 6.79min. LC-MS m/e=434.3 127 Scheme xii 63 x 54. X=N, Y=MeO 58, X=C* Y;-NtM 4 56, Zuti. Ys9MeO Xw-CI. Y=NtH2 55, XzM, V=Meo 69, X=CI. Y=N~ S7, Xij 1 Y=MeC 51, X=Ci. Y~wNH2 1- (4-Kethosy-beazoylamino) -3-methylhutyr-y1 pyrrolidine-2-carbozylic acid rerr-butyl ester To a suspension of R-val-pro-OrBusHCl (53) (2-011g, 7.44mmo1) in CH 2 C1 2 (20m11 was added PlEA (3.2m1, 18.4wxuoU followed by a Sol-Uticn of 4-methoxy-benzoyl chloride (1.26g, 7.4mmol) in CH 2 C1 2 (SWLI) The solution was stirred at room temperature under nitrogen for ihour then concentrated. The resulting oil was dissolved in tOAc and washed with 0.SN KHiS0 4 (2x), 128 saturated NaHCO 3 (2x) and brine, then concentrated in vacuo to give the title compound as a white solid (2.814g, 94% yield). 'H-NMR (500MHz, CDC13) 5 1.05 (dd, 6H), 1.46 9H), 1.88-2.29 5H), 3.65-3.74 (m, 1H), 3.81-3.92 IH), 3.85 3H), 4.32-4.42 (m, 1H), 4.81-4.91 1H), 6.79-6.86 1H), 6.91 (d, 2H), 7.78 2H). Analytical HPLC (cyano column) 10.18min.

1- (4-Methoxy-benzoylamino) -3-methylbutyryl] pyrrolidine-2-carboxylic acid tetrahydrofuran-3-yl) amide (56).

A 1.079g (2.67mmol) sample of 54 was dissolved in TFA in CH 2 Cl 2 (40mL) and stirred at room temperature for 4hours. The solvent was concentrated in vacuo to give 55 as a white solid (0.93g, 100%) which was used in the next step.

To a solution of 40 (1.796g, 6.17mmol) in CH 2 C1 2 was added DMBA (1.119g, 7.17mmol) and Pd(PPh 3 4 (0.683g, 0.59mmol) and the solution stirred at room temperature for 20 minutes. A solution of 55 (0.928g, 2.67mmol) in

CH

2 C1 2 (17ml) and DMF (2ml) was added, followed by HOBT (0.811g, 6.01mmol) and EDC (1.16g, 6.04mmol) The reaction was stirred at room temperature for 18hours under N 2 The solvent was evaporated, the crude material dissolved in EtOAc and washed with 0.5N NaHSO 4 saturated NaHCO 3 (2x) and brine and was dried over anhydrous Na 2

SO

4 filtered and evaporated to give a yellow solid. Purification by flash chromatography eluting with ethyl acetate/ CH 2 C1 2 (10/90 to 40/60%) gave the title compound as pale yellow solid (910mg, 63% yield). 1 H-NMR (500MHz, CDC13) 6 0.96 (dd, 6H), 1.84-2.19 4H), 2.25-2.38 1H), 2.45 (dd, 1H), 129 2.80-2.98 1H), 3.60-3.72 1H), 3.82-3.95 (m, 1H), 3.86 3H), 4.26-4.95 6H), 5.41(s, 0.2H), 5.53 0.8H), 6.67-6.77 1H), 6.88-6.99 2H), 7.22-7.57 5H), 7.71-7.82 2H).

Analytical HPLC (cyano column)(mixture of 2 diastereomers) 9.21min. LC-MS (ES m/e= 538.3 3- ((1-[2-(4-Methoxy-benzoylamino) -3-methyl-butyryl]pyrrolidine-2-carbonyl)-amino)-4-oxo-butyric acid (57).

A 125mg (0.23mmol) sample of 56 was hydrolyzed according to method A (see Scheme XXIII) to afford (58% yield) of the title compound: Analytical

HPLC

5.71min. LC-MS m/e=448.2 Preparation of 4 -Amino-3-chloro-benzoic acid: A suspension of 4-amino-3-chlorobenzonitrile (4.82g, 31.58mmol) was heated to reflux in 6N HC1 (140ml). The precipitate dissolved upon heating to give a colorless solution. Upon further heating the solution became cloudy. After 9hours the reaction was cooled to room temperature. The resulting precipitate was filtered, then dissolved in THF and the solvent evaporated. The residue was repeatedly concentrated from toluene to give a white solid (3.18g, 59% yield). IH-NMR (500MHz,

CD

3 OD:CDCl 3 1:4) 6 6.80 1H), 7.75 (dd, 1H), 7.94 (d, 1) Analytical HPLC (cyano column) 8.73min.

1- 2-( 4 -Amino-3-chloro-benzoylamino) 3 -methylbutyry] pyrrolidine-2-carboxylic acid tert-butyl ester (58) To a suspension of 53 (1.707g, 6.31mmol) in CH 2 C1 2 at 0 C was added DIEA (3.2ml, 18.4mmol) followed by a solution of 4-amino-3-chlorobenzoic acid (1.298g, 7.56mmol), HOBT (1.005g, 7 .44mmol) and EDC (1.456g, 7.58mmol). The resulting mixture was stirred at O'C I I 130 for 15 minutes then allowed to warm to -room temperature and stir for 18 hours. The solvent was evaporated and the resulting oil dissolved in EtOAc, washed with 0.SN NaHSO 4 saturated NaHCO 5 C2x) and brine to give a white solid (2.68g). Flash chromatography using MeOH/CR 2 Cl 2 (1/99 to 2/98%] gave 2.04g (06k yield) of a white solid. 1 5-tUhR C500MHZ, CDC 5 1.05 1.47 Cs, 9H)- 1.86-2.29 (Tr. SH) 3.62-3.78 (m, 1HU, 3-78-3.94 Cmn, 1H) 4.3.9 (dd, 4.79-4.89 (dd.

2-R) 6. 73 6 .73a 7. 52 {dd, 15) 7.7 1H). Analytical RPLC (cyano column) 16. 18mmi. LC.;- MES Tn/e=424.3 1- 12- C4-Aminio-3-chlero-benxoylamino) -3 -methylbutyryl] pyrrolidine-2-carboxylic acid tetrahydro-luran-3-yl) -amide A 0.632g Cl.4Smmol) sample of 59.was dissolved in So* TFA in CH 2 C1 2 (2OtrL) and the solution stirred at room temperature tor2 hours. Residual TFA was removed by repeated concentration from CH1 2 Clr (3x) to give the product as a white solid.

AL 385mg Cl.O4Tnol) sample was allowed to react with by the method used ±or compound 56. The title compound (6o) was isolaced as a yellow solid (265mg, 451 yield) 1 H NR (5SOOMHZ, Cfl 3 OD) 8 0.8 9 12 GE) 1. 72 -2.2 6 Cm, 55]. 2.45 (dd, 0.25H), 2.60 Cdd, 0.75), 2.80 (dd, 0275?:]i, 2.96-3.09 CM, 0.3H), 3.64-3.77 111), 3.94- 4.10 1H), 4.20-4.74 414). 4.76-4.95 Cmn, Is, 0.55], 5.61-5.70 (Tm. 1.55], 62*79 (dd. 1H), 7.23-7.43 SE), '7.48-17.61 1.4H), 7.68-7.81 (m, 7.99-82.2 0.6H).

I

131 Analytical HPLC (cyano column)(mixture of 2 diastereomers) 14.90, 15.20min. LC-MS m/e=557.2 3- 4 -Amino-3-chloro-benzoylamino) -3-methylbutyryl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (61).

A 45mg (0.08mmol) sample of 60 was hydrolyzed according to method A (see Scheme XXIII) to afford 30mg yield) of the title compound: 1H NMR (500MHz, CD 3 0D) 6 1.06 (dd, 6H), 1.78-2.38 5H), 2.38-2.86 2H), 3.62-3.83 1H), 4.12-4.76 4H), 7.04-7.21 (m, 1H), 7.58-8.01 2H); Analytical HPLC 8.16min. LC-MS (ES m/e=467.3 Scheme XIII Fmoc N O N? SCOt-Bu HO 0 COrtBu 62 63 HOO

OHO

64 1- (4-Hydroxy-3, 5-dimethyl-benzoylamino)-3-methylbutyryl]-pyrrolidine-2-carboxylic acid tert-butyl ester (63).

To a solution of 62 (prepared from 53 and Fmoc-Cl) (600mg, 1.22mmol) in anhydrous DMF (10ml) was added 132 diethylamine (3ml). The solution was stirred at room temperature under N 2 for 3hours and the solvent was evaporated. The resulting oil was dissolved in CH 2 C12 (8ml) and 3,5-dimethyl-4-hydroxybenzoic acid (0.302g, 1.82mmol), HOBT (338mg, 2.5mmol) and EDC (0.456g, 2.43mmol) were added and the solution stirred at room temperature under N 2 for 18hours. The solvent was concentrated in vacuo and the resulting oil dissolved in EtOAc, washed with 0.5N NaHS04 saturated NaHCO 3 (2x) and brine to give the crude product as a white solid (0.80g). Flash chromatography eluting with MeOH/CH 2 C2 (1/99 to 2/98%) gave 380mg (75% yield) of a white solid. 1 H-NMR (500MHz, CDCl 3 5 1.06 (dd, 6H), 1.47 9H), 1.90-2.32 5H), 2.24 6H), 3.65- 3.75 1H), 3.84-3.92 1H), 4.36-4.42 1H), 4.82-4.88 1H), 5.53-5.61 1H), 6.77-6.85 (m, 1H), 7.42 2H). Analytical HPLC (cyano column) 17.53min. LC-MS (ES m/e=419.3 1- (4-Hydroxy-3,5-dimethyl-benzoylamino) -3-methylbutyryl]-pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (64).

Prepared from 63 and 40 by the method used to prepare 56 to give title compound (64) as a pale yellow solid (352mg, 72% yield). 1 H-NMR (500MHz, CD 3 0D) 8 0.83-1.28 6H) 1.66-2.37 3H), 2.23 6H), 2.48-2.54 (m, 0.2H), 2.61 (ddd, 0.8H), 2.72 (ddd, 0.9H), 3.01-3.09 3.66-3.76 1H), 3.95-4.07 1H), 4.48- 4.73 3H), 4.75-4.92 1H), 5.45-5.48 0.1H) 5.61-5.64 0.1H), 5.64-5.70 0.8H), 7.21-7.62 (m, 6H), 7.88-8.04 1H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 17.73min. LC-MS m/e= 552.3

I

133 3- ((1-12-(4-Hydroxy-3,5-dimethyl-benzoylaaino)-3methyl-butyryl] -pyrrolidine-2-carbonyl)-amino)-4-oxobutyric acid A 160mg (0.29mmol) sample of 64 was hydrolyzed according to method A (see Scheme XXIII) to afford 13.1mg (10% yield) of the title compound: Analytical HPLC (cyano column) 10.28min. LC-MS m/e=462.2 Scheme XIV Fmoj

N

7 CO-t-aU O&H C024t-E 67 O O N r02H I_ 44 ?r0 yH )0)N44 -0 69 68 1- 12 2 -9H-Fluoren-9-yl-acetylamino)-3,3-dimethylbutyryll-pyrrolidine-2-carboxylic acid tert-butyl ester (66).

To a solution of H-pro-OtBu (53) (1.033g, 6.Ommol, II, Scheme 5) in CH 2 C1 2 (20ml) and DMF (5ml) was added Fmoc-tLeu-O (2.337g, 6.60mmol, I, Scheme

HOBT

:1.63q, 12.mmol) and EDC (2.309, 12.0mmol) and the slution stirred at room temperature under N 2 for o, i :urs. The solvent was removed in vacuo, and the resicue clssczved in EtOAc then washed with 0.5N NaHSO 4 saturated NaHCO- (2x! and brine. The organic 134 layer was dried over anhydrous Na 2

SO

4 and evaporated to give a pale yellow solid (3.65g). Flash chromatography using EtOAc/hexanes (10/90 to 20/80%) give the title compound (66) (2.25g, 74% yield). 1H-NMR (500MHz, CDC13) 6 1.09 9H), 1.47 9H), 1.79-2.28 3H), 3.62-3.72 1H), 3.76-3.83 1H), 4.18-4.43 (m, 4H), 5.48-5.67 1H), 7.28-7.44 4H), 7.55-7.64 2H), 7.72-7.82 2H). Analytical HPLC (cyano column) 11.95min. LC-MS (ES m/e=507.3 1-[2-(4-Methoxy-benzoylamino)-3,3-dimethyl-butyryl]pyrrolidine-2-carboxylic acid tert-butyl ester (67).

To a solution of 66 (0.503g, 0.99mmol) in DMF (8ml) was added diethylamine (2.5ml) and the solution stirred at room temperature for 1hour and the solvent evaporated.

The resulting residue was repeatedly concentrated from

CH

2

CI

2 The resulting oil was dissolved in CH 2 C12 (9ml) and DIEA (26041, 1.49mmol) and 4-methoxy-benzoyl chloride (190mg, 1.05mmol) was added. The solution was stirred under N 2 for 18hours and the solvent concentrated in vacuo. The residue was dissolved in EtOAc and washed with 0.SN NaHSO 4 saturated NaHCO 3 (2x) and brine then dried over anhydrous Na 2

SO

4 and evaporated to give a white solid (0.529g). Flash chromatography on silica gel using MeOH/CH 2 C1 2 (1/99 to 2/98%) gave the title compound (2.25g, 74% yield). 1H- NMR (500MHz, CD 3 0D) 6 1.01 1.4H), 1.11 7.6H), 1.73-2.25 4H), 2.47-2.77 1H), 2.81 (dd, 0.7H), 2.91-3.11 0.3H), 3.61-4.03 3H), 3.84 3H), 4.29-4.49 1H), 4.49-5.00 5H), 5.46 0.15H), 5.58-5.73 0.85H), 6.94-7.04 2H), 7.27-7.41 (m, 4H), 7.61-7.73 1H), 7.74-7.84 2H). Analytical HPLC (cyano column) 13.10min.

135 1-[2-(4-Methoxy-benzoylamino) -3,3-dimethyl-butyryl pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (68).

To a solution of 67 (0.90g, 1.74mmol) in CH 2 C1 2 was added 2,6-lutidine (2.1ml, 18.0mmol) and TMStriflate (2.3ml, 11.9mmol) and the reaction stirred at room temperature under N 2 for 1.5hours. The resulting mixture was diluted with CH 2 C1 2 washed with 10% NaHCO 3 (2x) and brine then dried over Na 2 S0 4 filtered and evaporated. The residue was dissolved in CH 2 C12 then treated with DIEA (0.6ml, 3.5mmol) and 4-methoxybenzoyl chloride (0.355g, 2.09mmol) and allowed to stir under N 2 at room temperature for 18hours. The crude product was purified by flash chromatography, eluting with CH 2 C1 2 /MeOH (99/1) to yield the title compound (274mg, 28% yield). 1 H-NMR (500MHz, CD 3 0D) 8 1.01 (s, 1.4H), 1.11 7.6H), 1.73-2.25 4H), 2.47-2.77 (m, 1H), 2.81 (dd, 0.7H), 2.91-3.11 0.3H), 3.61-4.03 3H), 3.84 3H), 4.29-4.49 1H), 4.49-5.00 (m, 5H), 5.46 0.15H), 5.58-5.73 0.85H), 6.94-7.04 2H), 7.27-7.41 4H), 7.61-7.73 1H), 7.74- 7.84 2H). Analytical HPLC (cyano column)(mixture of 2 diastereomers) 17.03, 17.39min. LC-MS (ES m/e=552.3 [2-(4-Methoxy-benzoylamino)-3,3-dimethylbutyryl] -pyrrolidine-2-carbonyl)-amino) -4-oxo-butyric acid (69).

A 117mg (0.21mmol) sample of 68 was hydrolyzed according to method C (see Scheme XXIII) to afford (41% yield) of the title compound: Analytical HPLC 7.16min. LC-MS (ES 4 m/e=462.3 7 7 1.36 Schem r SC0~C 2 cmPh 0N 700 0 H H2NdP 0-a/ C1 0 C1 73 72 rert-13toxycarbcuylaaio-3,3-dimethyl-butyl)pyrrolidine-2-carbozyltc acid beuuyl ester To a suspension of S-pro-OBzV-HC1 (2.00g. 8.66mol) in

CH

2 C1 2 (20ml) was added DIEA (2.25I1, 12.92imol) to give a colorless solution. Boc-rLeu-OH 9.S2mmol), HOET (1.76g, 1303minol) and EDC (2.49g, 12.95mmcl) wiere added and the solution stirred under N 2 at room temperature for 18ours. Removed solvent in vacuo dissolved in EtOAc and washed with 120, 0-SN NaHs0 4 saturated NaHCO 3 (2x) and brine. Dried over anbydrous Na 2

SO

4 and evaporated to give the title compound. (3.57g, 99! yield). 1-NNR (SO0Hz, CDC1 3 is 0.99 9K), 1-40 9H), 1.88-2.33 41), 3.58- 3.90 21) 4.21-4.35 1W), 4.53-4.66 IH), 5.04-5-38 3H), 7.14-7.42 5R). LC-MS (ES') in/e419.4 (Mt*H) (1-j2-(2-cnzyloxy-5-oxe-tetrahyro-furmn-3ylcarbaaoyH -pyrrolidiae-1-carbonyl -,2-dimethylpropyl}-carbamic acid rert-butyl ester (71).

I

137 An 871mg (2.08mmol) sample of 70 was dissolved in MeOH and 10% Pd/C (200mg) added. The suspension was stirred under H 2 for ihour then filtered through Celite and the solvent evaporated. This resulting residue was reacted with 40 according to the procedure used to prepare 56 to give 889mg (71% yield) of the title compound 1 H-NMR (500MHz, CDC13) 6 0.93 9H), 1.44 9H), 1.78-2.18 4H), 2.29-2.49 2H), 2.76-3.04 1H) 3.50-3.70 1H), 3.70-3.85 (m, 11H), 4.20-4.37 1H), 4.49-4.78 3H) 4.78-4.98 1H), 5.12-5.26 1H), 5.40-5.59 H) 7.10- 7.78 5H). Analytical HPLC (cyano column) 11.17min.

LC-MS m/e=518.3 (M+H) 1- (4-Amino-3-chloro-benzoylamino) -3,3-dimethylbutyryll-pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (72).

A solution of 456mg (0.088mmol) of 71 in CH 2 C12 was treated with anhydrous TFA (5mL) then stirred at room temperature under N 2 for 1 hour and evaporated to dryness. The residue was repeatedly concentrated from

CH

2 C1 2 (3x) then dried under vacuum. The resulting residue was dissolved in CH 2 C12 (20ml), cooled to 0C,.

then treated with DIEA (1.3ml, 8eq, 2.46mmol) followed by 4-amino-3-chloro-benzoic acid (202mg, 1.17mmol), HOBT (183mg, 1.35mmol), and EDC (279mg, 1.45mmol). The resulting mixture was allowed to warm to room temperature and stir for 18hours. The solvent was removed in vacuo and the residue dissolved in EtOAc then washed with distilled water 0.5N NaHSO 4 (2x) saturated NaHC0 3 (2x) and brine. The organic layer was dried over Na 2

SO

4 filtered and evaporated to give a residue that was purified by flash chromatography, eluting with CH 2 C1 2 /MeOH (99/1 to 138 affording 265mg (57% yield) of the title compound (72) as a yellow solid.

H-NMR (500MHz, CD 3 0D) 5 0.91-1.24 9H), 1.70-2.27 4H), 2.47-2.85 1.5H), 2.99-3.13 3.39-3.53 0.5H), 3.60-3.78 1.5H), 3.85-4.04 (m, 1H), 4.24-4.47 2H), 4.53-4.97 4H), 5.46 (s, 0.3H), 3.88-4.02 0.1H), 5.60-5.69 0.6H), 6.80 1H), 7.22-7.77 7H). Analytical HPLC (cyano column)(mixture of 2 diastereomers) 15.90, 16.23min.

LC-MS (ES m/e=571.2 3- (4-Amino-3-chloro-benzoylamino) -3,3-dimethylbutyryl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (73).

A 40mg (0.07mmol) sample of 72 was hydrolyzed according to method A (see Scheme XXIII) to afford 25mg (74% yield) of the title compound: Analytical HPLC (cyano column) 10.66min. LC-MS (ES m/e=481.3 Scheme XVI Bo N 4Alo N 0 CO 2 H H 0 N 74 40

R

1 C02H 76-93 139 {2-[2-(2-Benzyloxy-5-oxo-tetrahydro-furan-3ylcarbamoyl)-pyrrolidin-1-yl -1-methyl-2-oxo-ethyl}carbamic acid tert-butyl ester To a solution of 40 (6.69g, 23.0mmol) in anhydrous

CH

2 C1 2 was added 1,3-dimethylbarbituric acid (DMBA) (3.97g, 25.4mmol) and Pd(PPh 3 4 (1.12g, 0.97mmol). The solution was stirred under N 2 at room temperature for cooled to 0°C, followed by the addition of Bocala-pro-OH (BaChem) (5.087g, 17.8mmol), HOBT (3.60g, 26.7mmol) and EDC (5.12g, 26.7mmol). The resulting solution was allowed to warm to room temperature and stir under N 2 for 18hours. The solvent was concentrated in vacuo and the residue dissolved in EtOAc, then washed with 0.5N NaHSO 4 saturated NaHCO 3 (2x) and brine. The organic layer was dried over anhydrous Na 2

SO

4 and evaporated to give an orange oil (12.23g). Flash column chromatography on silica gel using CH 2 C1 2 /EtOAc (80/20 to 60/40) gave the title compound 75 as a yellow solid (7.28g, 86% yield). 1

H-

NMR (500MHz, CD30D) 6 1.19-1.31 3H), 1.42 9H), 1.69-2.29 4H), 2.45-2.67 0.9H), 2.71-2.86 (m, 2.99-3.10 0.6H), 3.49-3.84 2H), 4.24- 4.45 2.5H), 4.57-4.73 1.5H), 4.76-4.92 1H), 5.45 0.45H), 5.63-5.68 0.55H), 7.25-7.40 (m, 5H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 15.99, 16.33min. LC-MS m/e=476.3 140 (4-Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide] (76).

A 1.899g (3.99mmol) sample of 75 in CH 2 C12 (20ml) was treated with anhydrous TFA (5ml) then stirred at room temperature under N2 for 1 hour and evaporated to dryness. The residue was repeatedly concentrated from

CH

2 C1 2 (3x) then dried under vacuum. The resulting residue was dissolved in CH 2 C1 2 (20ml), cooled to 0 C, then treated with DIEA (5.6ml, Beq, 32.1mmol), 4-amino- 3-chloro-benzoic acid (0.910g, 5.3mmol), HOBT (0.824g, 6.lmmol), and EDC (1.197g, 6.23mmol). The resulting mixture was warmed to room temperature and stirred for 18hours. The solvent was removed in vacuo and the residue dissolved in EtOAc then washed with distilled water 0.5N NaHSO 4 saturated NaHCO 3 (2x) and brine. The organic layer was dried over Na 2

SO

4 filtered and evaporated to give a residue that was purified by flash chromatography using CH 2 C1 2 /MeOH (99/1 to 97/3%) The title compound was obtained as a white solid (1.221g, 58% yield). H-NMR (500MHz, CD 3 0D) 6 1.15 0.25H), 1.29-1.60 2.75H), 2.41-2.54 (m, 2.55-2.70 0.5H), 2.77 (dd, 0.5H), 3.03 (ddd, 3.59-3.75 1H) 3.75-3.98 1H), 4.26-5.01 5H), 5.41-5.57 1H). 5.60-5.76 0.5H), 6.70- 6.92 0.5H), 7.15-7.48 5H), 7.48-7.68 1H) 7.68-7.88 1H), 8.15-8.34 1H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 14.44, 14.89min. LC-MS m/e=529.3

N

77

H

OU

141 (4-Methoxy-3,5-dimethyl-benzoylamino)propionyl]-pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide] (77) was synthesized from 75 and 3,5-dimethyl-4-methoxy benzoic acid according to the procedure used to prepare 76 to afford the title compound (1.18g, 44% yield). IH-NMR (500MHz, CD 3 0D) 6 1.40 3H), 1.67-2.41 4H), 2.28 6H), 2.48 (ddd, 0.5H), 2.62 (dd, 0.5H), 2.78 (ddd, 0.5H), 3.04 (ddd, 0.5H), 3.62-3.94 3H), 3.71 (s, 3H), 4.21-4.51 2H), 4.59-4.85 4H), 5.46 (s, 0.25H), 5.52 0.25H), 5.63 0.4H), 5.67 (d, 0.1H), 7.17-7.45 5H), 7.45-7.65 2H).

Analytical HPLC (cyano column) (mixture of 2 diastereomers) 15.06, 15.39min. LC-MS m/e=538

(M+H)

Preparation of 4 -Acetylamino-3-chlorobenzoic acid To a solution of 4-amino-3-chloro-benzoic acid (10.0g, 58.3mmol) in anhydrous THF (100mL) was added acetyl chloride (20.7ml, 291.1mmol) and the solution stirred at room temperature for 48hours. The solvent was evaporated and the product precipitated from hexanes then filtered and dried to give a white solid (11.73g, 94% yield). IH-NMR (500MHz, CD 3 0D) 6 2.28 3H), 7.92 (dd, 1H) 7.99-8.16 2H) Analytical HPLC (cyano column) 7.84min.

142 1- (4-Acetylanino-3-chloro-benzoylamino) -propionyl] pyrrclidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (78).

Prepared from 75 and 4-acetylamino-3-chloro-benzoic acid according to the procedure used to prepare 76 to afford the title compound (146mg, 19% yield) 1

H-NNR

(500MHz, CD 3 OD) 6 1. 28 52 3H) 1. 68 38 Cm, 4H) 2.20 (Cs, 3H), 2.41-2.88 (mn, 1iSH), 2.96-3.10 Cm, 0.5H1), 2.96-3.10 Cm, 0.5H1), 3,43-3.75 1H1), 3.80-3.96 (mn, 111), 4-25-5.00 5.42-5.54 0.5H1), 5.63-5.78 Cm, 0.511), 7.13-7.48 (mn, 05H1), *7.79-8.14 8.56-8.70 0.511) Analytical EPLC (cyano column) (mixtlure of 2 diastereoners) 8.64min. LC-MS i/e=5'71.2 0 00 y79 1- (3-Isapropcxy-benzoylamino) -propiony.]pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl) -azmide (79).

Prepared from 75 and 3-isopropoxybenzoic acid according to the procedure used to prepare 76 to afford the title compound (120mg, 5B% yield) 1 1-NMR (500MHz, CD 3 OD)6 1.27 6H1), 1.33-1.52 (mn, 3H1), 1.69-2.31 4H) 2.49 (dd, 0.3H1), 2.63 (dd, 0.7H1), 2.78 Cdd, 0.7H1), 3.03 (dd, 0.3H1), 3.43-3.73 1H) 3.78-3.94 Cin,1H) 4.27- 4.47 2H1), 4.47-4.87 411), 5.47 Cs, 0.7H1), 5.53 0.3H1), 5.64 0.BH-) 5.72 Cd, 0.2H1), 6.98-7.12 (in, 1H) 7.19-7.47 (in. 9H1) Analytical HPLC (cyano 143 column) (mixture of 2 diastereomers) 14.54, 14.85min.

LC-MS (ES m/e=538 0 NI-ll N -o N &N 011~ N 80 O Quinoxaline-2-carboxylic acid (2-[2-{2-benzyloxy-5-oxotetrahydrofuran-3-ylcarbamoyl)-pyrrolidin-1-yl]-1methyl-2-oxo-ethyl}-amide Prepared from 75 and 2-quinoxaline carboxylic acid according to the procedure used to prepare 76 to afford the title compound (122mg, 60% yield). 1 H-NMR (500MHz,

CD

3 0D) 5 1.12-1.67 3H), 1.68-2.34 4H), 2.35-2.70 0.85H), 2.70-2.95 0.75H), 3.06 (dd, 0.4H), 3.41-3.49 2H), 4.18-5.03 6H), 5.47 5.55, 2H), 5.67 (dd, 1H), 5.71 (dd, 0.3H), 7.03- 7.53 5H), 7.80-8.06 2H), 8.06-8.34 2H), 9.43-9.48 1H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 9.06min. LC-MS (ES+) m/e=532.3

O

0- N 81 H 8 144 1- (3-Benzyloxy-4-methoxy-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (81).

Prepared from 75 and 3-benzyloxy-4-methoxy benzoic acid according to the procedure used to prepare 76 to afford the title compound (142mg, 58% yield). IH-NMR (500MHz,

CD

3 0D) 6 1.14 0.3H), 1.27-1.52 2.7H), 1.66-2.30 4H), 2.47 (dd, 0.4H), 2.59 (dd, 0.6H), 2.77 (dd, 0.6H), 3.02 (dd, 0.4H) 3.41-3.72 1H), 3.72-3.99 2H) 3.86 3H) 4.19-4.86 5H) 4.99-5.15 (m, 2H), 5.45 0.8H), 5.65 1.2H), 6.98 (dd, 1H), 7.11-7.63 12H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 12.28, 12.44min.

LC-MS (ES m/e=616.3 4-Allyloxy-3,5-dimethyl-benzoic acid.

A mixture of 4-hydroxy-3,5-dimethyl-benzoic acid (3.32 g, 20 mmol), allyl bromide (7.26 g, 60 mmol), benzyltriethylammonium chloride (455 mg, 2 mmol) and

K

2

CO

3 (6.9 g, 50 mmol) in DMF (50 mL) was stirred at room temperature for 16 hours. The mixture was diluted with ethyl acetate (200 mL), washed with water, brine.

The organic layer was dried over Na 2

SO

4 filtered and evaporated in vacuo to give 5.3 g of the ester as an oil. The ester was refluxed with NaOH (5 g, 125 mmol) in water/methanol (50 mL/50 mL) for 6 hours. The mixture was evaporated in vacuo to remove methanol and the resulted solution was diluted with water (200 mL), washed with ethyl acetate/hexane (30 mL/70 mL). The aqueous layer was acidified at 0 C with concentrated HCI solution to pH 2. The resulted precipitate was collected by filtration and washed with water, dried 145 over high vacuum to afford 3.86 g (yield 94%) of the title compound. 'H-NMR (500 MHz, CDC13): 6 2.33 (s, 6H), 4.35-4.37 2H), 5.28-5.30 5.42-5.46 (m, 6.07-6.15 7.79 2H); retention time on analytical HPLC: 11.28 min; LC-MS: m/z 205 0

C

KZ 0 82 1-[2-(4-Allyloxy-3,5-dichloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (82).

Prepared from 75 and 4-allyloxy-3,5-dichloro-benzoic acid according to the procedure used to prepare 76 to afford the title compound (208mg. 47% yield). 1

H-NMR

(500MH, CDC1 3 8 1.05-1.58 3H), 1.68-3.21 7H), 3.39-3.90 3H), 4.05-5.01 6H), 5.22-5.62 (m, 3H), 6.04-6.25 1H), 6.94-7.63 8H). Analytical HPLC (cyano column)(mixture of 2 diastereomers) 9.69, 9.89min. LC-MS m/e=604.2 0 N I H

HOH

83 1- [2-(3,5-Dichloro-4-hydroxy-benzoylamino) -propionyl]pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (83).

A 140 mg sample of 82 (0.23mmol) was dissolved in

CH

2 C1 2 (4mL) and treated with DMBA (35.4mg, 0.26mmol) and Pd(PPh 3 4 (32mg, 0.028mmol). The solution was 146 stirred at 0 0 C for 15mins, warmed to room temperature for 2hours, then diluted with CH 2 C1 2 and washed with water (2x) and brine. The solvent was concentrated in vacuo and the residue purified by flash chromatography on silica gel using MeOH/CH 2 C1 2 (1/99 to 3/97) to give the title compound (93.2mg, 71% yield). 1

H-NMR

(500MHz, CD 3 0D) 6 1.16 0.25H), 1.28-1.49 2.75H) 1.63-2.33 4H), 2.48 (dd, 0.4H) 3.39-3.59 (m, 0.2H), 3.60-3.73 0.8H), 3.73-3.96 1H) 4.24- 4.48 2H), 4.57-4.92 7H), 5.44 0.4H) 5.50 0.4H), 5.64 0.8H), 5.75 0.5H) 7.16-7.43 5H), 7.78-7.89 1.6H), 8.40-8.63 0.4H).

Analytical HPLC (cyano column)(mixture of 2 diastereomers) 11.57, 11.82min. LC-MS (ES m/e=564.1

(M+H)

84

H

1- (2-Benzoylamino-propionyl) -pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3-yl)-amide (84).

Prepared from 75 and benzoyl chloride according to the procedure used to prepare 76 to afford the title compound as a colorless oil (8mg, 38% yield). 1

H-NMR

(500MHz, CD30D) 6 1.35-1.54 3H), 1.72-2.30 4H), 2.42-2.70 1.3H), 2.74-2.84 0.5H) 3.03 (dd, 0.2H) 3.41-3.75 2H), 3.81-3.96 1H), 4.22-4.86 4H), 5.46 0.3H), 5.51-5.54 0.1H) 5.66 (d, 5.72 0.1H), 7.20-7.57 7H), 7.77-7.89 (m, 2H), 8.42-8.67 1H). Analytical HPLC (cyano 147 column) (mixture of 2 diastereomers) 15.23, 15.67min.

LC-MS (ES m/e=481.2 (M+H) 0 Isoquinoline-l-carboxylic acid (2-(2-benzyloxy-5-oxotetrahydro-furan-3-ylcarbamoyl) -pyrrolidin-1-yl] -1methyl-2-oxo-ethyl}-amide Prepared from 75 and 1-isoquinolinecarboxylic acid according to the procedure used to prepare 76 to afford the title compound (732mg, 53% yield). 1 H-NMR (500MHz,

CD

3 0D) 6 1.22-1.56 3H), 1.70-2.34 4H), 2.43-2.71 0.9H), 2.73-2.89 0.5H), 3.06 (ddd, 0.6H), 3.42- 3.81 2H), 3..84-4.01 1H), 4.29-5.00 SH), 5.47 0.65H), 5.55 0.3H), 5.67 0.8H), 5.72 0.25H), 7.21-7.43 5H), 7.49-7.83 2.8H), 7.88-8.04 1.8H), 8.45-8.54 0.8H), 8.97-9.06 (m, 0.6H). Analytical HPLC (mixture of 2 diastereomers) 15.71, 16.04min. LC-MS (ES m/e=531.2 0

H

2 N o N C 86

H

1- (4-Amino-5-chloro-2-methoxy-benzoylamino) propionyl]-pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (86).

Prepared from 75 and 4-amino-5-chloro-2-methoxy benzoic acid according to the procedure used for 76 to afford 1 148 the title compound (330mg, 61% yield). 1 H-NMR (500MHz,

CD

3 OD) 6 1. 22 0.25H), 1.29-1.50 0.75H), 1.68- 2.36 4H), 2.38-2.89 1.5H), 2.94-3.14 3.37-3.98 6H), 4.27-4.98 GH), 5.44-5.50 (m, 0.4H), 5.53-5.56 O.1H), 5.60-5.75 0.5H), 6.50 11H), 7.17-7.45 4H), 7.73-7.90 1i), 8.49- 8.70 1H). Analytical HPLC (cyano column)(mixture of 2 diastereomers) 16.39, 16.82min. LC-MS m/e= 559.2 0 H 187K 4 1-[2-(4-Acetylaino-5-chloro-2-methoxyt-benzoylamino) propionyl]-pyrrolidine-2-carboxylic acid (2-benzylory- 5-oxo-tetrahydro-furan-3-yl)-amide (87).

Prepared from 75 and 4-acetylamino-5-chloro-2-methoxy benzoic acid according to the procedure used for 76 to afford the title compound (364mg, 64% yield). 1

H-NMR

(500MHz, CD 3 0D) 6 1.20-1.27 0.25), 1.35-1.49 (m, 0.75H), 1.72-2.30 4H), 2.23 3H), 2.42-2.58 (m, 0.6H), 2.59-2.68 0.5H), 2.73-2.86 0.7H), 2.99- 3.11 0.7H), 3.41-4.07 51), 4.29-4.97 4.79-5.56 0.5H), 5.65-5.73 0.5H), 7.18-7.44 (m, 4.3H), 7.90-8.09 2H), 8.71-8.85 0.7H).

Analytical HPLC (cyano column)(mixture of 2 diastereomers) 15.61, 16.1Olmin. LC-MS m/e= 601.1 149 Pyridine-2-carboxylic acid{2- tetrahydro-furan-3 -ylcarbazuoyl) -pyrrolidin-1-yl] -1methyl-2-oxo-ethyl)-amide (88).

Prepared from 75 and pyridine-2-carboxylic acid according to the procedure used for 76 to afford the title compound (233mg, 421 yield) 'H-NMR (500MHz,

CD

3 OD) 5 1.30-1.59 (Mn, 3H), 1.68-2.36 2.39-2.57 (mn, 0.6H1), 2.57-2.69 (mn, 0.35H) 2.71-2.837 0.4H) 3.05 (dd, 0.65H1), 3.39-3.93 (mn, 3H1), 4.24-4.99 (mn, 51!), 5.49-5.55 0.811), 5.63-5.77 (mn, 7.17-7.46 (m, 5H1), 7.49-7.60 (in, 1H1), 7.89-7.99 (mn, 111), 8.03-8.12 (mn, 8.58-8.67 111). Analytical RPLC (cyano column) (mixture of 2 diastereoners) 8.63min. LC-MS in/e=481.3

H

2 N~q C1 89 H 12 (4 -Amino 5 -dichloro -benzoylamino) -prapionylJ pyrrolidine-2 -carboxylic acid (2 tetrahydro-furan-3-yl) -snide] (89).

Prepared from 75 and 3,5-dichloro-4-aininobenzoic acid according to the procedure used for 76 to afford the title compound (162mg,'70% yield) 1 11-NMR (500MHz,

CD

3 QD) 8 1.21-1.58 3H), 1.58-2.37 (in, 4H), 2.37-3.13 214), 3,43-3.74 (in, 1.5EV, 3.77-3.94 1H1), 4.28- 150 4.51 1.5H), 4.50-5.01 3H), 5.41-5.77 1H), 7.15-7.49 5H), 7.66-7.88 2H). Analytical HPLC (cyano column)(mixture of 2 diastereoners) 8.36min. LC- MS m/e=563.2 0 1-[2-(4-Methoxy-benzoylaino)-propionyl -pyrrolidine-2carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3yl)-amide Prepared from 75 and 4-methoxy-benzoylchloride according to the procedure used for 76 to afford the title compound (404mg, 1 H-NMR (500MHz, CD30D) 1.19 0.3H), 1.29-1.58 2.7H), 1.58-2.38 4H), 2.43-2.69 1H), 2.74-2.86 0.6H), 2.99-3.11 (m, 0.4H), 3.39-3.75 1.5H), 3.77-3.94 1H), 3.84 (s, 3H), 4.29-4.94 4.5H), 5.45-5.55 4.5H), 5.63- 5.71 0.5H), 5.73 0.1H), 6.85-7.09 2H), 7.19-7.44 4H), 7.73-7.92 2H), 8.26-8.44 (m, 1H). Analytical HPLC (cyano column)(mixture of 2 diastereomers) 15.18, 15.65min.. LC-MS (ES4) m/e=510.2 151 [(9-Oxo-9H-fluorene-4-carbonyl)-amino] -propionyl}pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (91).

Prepared from 75 and 9-oxo-9H-fluorene-carboxylic acid according to the procedure used for 76 to afford the title compound (403mg, 44% yield) "H-NMR (500MHz, CDC1 3 6 1.38-1.59 3H), 1.75-2.37 4H), 2.43-2.59 0.65H), 2.59-2.72 0.35H), 2.79-2.89 0.35H), 3.01-3.11 0.65H), 3.68-3.86 1H), 3.92-4.09 (m, 1H), 4.35-5.03 7H), 5.42-5.90 1H), 7.06-8.00 12H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 12.30min. LC-MS m/e=582.1 0 Hr C0 N.0 N 92 1- 5-Dichloro-4-methoxy-benzoylamino) -propionyll. pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (92).

Prepared from 75 and 3,5-dichloro-4-methoxy-benzoic acid according to the procedure used for 76 to afford the title compound (364mg. 46% yield). 1 H-NMR (500MHz,

CD

3 0D) 5 1.17 0.25H), 1.28-1.53 2.758), 1.64- 2.33 4H), 2.39-2.94 1.SH), 2.94-3.12 3..41-3.74 2H), 3.74-4.00 1H), 3.91 3H), 4.26-5.02 SH), 5.42-5.81 1H), 7.08 0.4H), 7.21-7.43 4.6H), 7.53-7.69 0.8W), 7.85-7.97 (m, 1.2H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 10.79min. LC-MS m/e=578.2 152 93 Quinoline-6-carboxylic acid {2-(2-benzyloxy-5-oxotetrahydro-furan-3-ylcarbamoyl) -pyrrolidin-1-yl] -1methyl-2-oxo-ethyl)-amide (93).

Prepared from 75 and 6-quinolinecarboxylic acid according to the procedure used for 76 to afford the title compound (344mg, 71% yield). 1 H-NMR (500MHz,

CD

3 0D) 5 1.11-1.58 3H), 1.69-2.40 4H), 2.42-3.15 2H), 3.80-4.01 1H), 4.29-4.99 5H), 5.44- 5.54 0.5H), 5.63-5.73 0.4H), 5.73-5.79 (d, 0.1H), 7.18-7.43 5H), 7.56-7.67 1H), 8.08 (d, IH), 8.13-8.25 1H), 8.40-8.56 2H), 8.88-8.99 1H). Analytical HPLC (cyano column) (mixture of 2 diastereomers) 10.27, 10.50min. LC-MS m/e=531.2 153 Scheme XVII CbLNJ.N/7 O CO2H 94 CbN

N

O CO2Bu-t R C Bu-N O CO2BU-t R CO2H O CO2H 1- (2-Benzyloxycarbonylamino-propionyl)-pyrrolidine-2carboxylic acid tert-butyl ester Prepared according to the method described in Pierre Chevallet, Patrick Garrouste, Barbara Malawaska Jean Martinez in Tetrahedron Letters, Vol. 34, pp. 7409- 7412, (1993). A mixture of Cbz-ala-pro-OH (10.0 g, 31.2 mmol), tert-butyl bromide (180 g, 1.31 mol), benzyltriethylammonium chloride (7.11 g, 31.2 mmol) and

K

2

CO

3 (180 g, 1.30 mol) in N,N-dimethylacetamide (DMA) (225 mL) was stirred at 55°C for 24 hours. The reaction mixture was cooled to room temperature and diluted with one liter of ice-water, extracted with ethyl acetate (200 mL x The organic layer was dried over anhydrous Na 2

SO

4 filtered and evaporated in 154 vacuo to give 14 g of oil, which was purified by flash chromatography using hexane/ethyl acetate (95/5 to 50/50) to afford 11.73 g (yield 99.7%) of the title compound as a clear oil. 1 H-NMR (500 MHz, CDCl 3 1.25-1.50 12 1.85-2.25 4H), 3.42-3.70 (m, 2H), 4.25-4.57 2H), 5.07-5.11 2H), 5.69 H), 7.28-7.38 5H); retention time on analytical HPLC: 11.07 min; LC-MS: m/z 377 Z0 0 I

I

1O CO 2 Bu-t O CO 2

H

x x 96a, X=CI, Y=NH 2 Z=H 97a, X=CI, Y=NH 2

Z=H

96b, X=CI, Y=AcNH, Z=H 97b, X=CI, Y=AcNH, Z=H 96c, X=CI, Y=AcNH, Z=CH 3 0 97c, X=CI, Y=AcNH, Z=CHO3 1- (4-Amino-3-chloro-benzoylamino -propionyl]pyrrolidine-2-carboxylic acid tert-butyl ester (96a).

To a solution of 95 (10.50g, 27.9mmol) in MeOH (100ml) was added a suspension of 10% Pd/C (5.00g) in EtOAc The mixture was stirred under H 2 for 48hours, filtered through celite and the solvent evaporated to yield a waxy solid. This was dissolved in CH 2 C1 2 (100ml) and DMF (50ml) and the solution cooled to 0°C.

4-Amino-3-chlorobenzoic acid (5.82g, 27.2mmol), DIEA (14.58ml, 83.7mmol), HOBT (3.77g, 27.9mmol) and EDC (6.68g, 34.8mmol) were added and the solution stirred at 0 0 C for 15mins then at room temperature for 24hours.

The reaction mixture was diluted with EtOAc, washed with NaHSO 4 10% NaHCO 3 (2x) and brine then dried over MgS0 4 filtered and evaporated. The crude product was purified by flash column chromatography, using

CH

2 C1 2 /MeOH (99/1 to 97/3%) to yield the title compound 155 as a white solid .(7.75g, 70% yield). 1 H-NMR (500MHz,

CD

3 0D) 6 1.27-1.67 12H), 1.82-2.14 4H), 3.48- 3.85 2H), 4.26-4.53 3H), 4.81-4.98 1H), 6.71 1H), 7.15 1H), 7.50 (dd, 1H), 7.75 (d, 1H) Analytical HPLC 10.83min. LC-MS m/e=396.3 (MH) 1- (4-Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid (97a).

Prepared from 96a by treatment with TFA/ CH 2

C

2 After complete reaction, the solvent is removed in vacuo and the residue repeatedly concentrated from toluene. The resulting residue was dried under vacuum to a constant weight.

1- (4-Acetylamino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tert-butyl ester (96b).

Prepared from 95 and 4-acetylamino-3-chlorobenzoic acid according to the method used for 96a to afford the title compound as a white solid (9.18g, 77% yield).

1 H-NMR (500MHz, CD3OD) 6 1.30-1.62 12H), 1.85-2.16 3H), 2.16-2.44 1H), 2.27 3H), 3.47-3.83 (m, 2H), 4.34-4.54 1H), 4.8.9 1H), 7.27-7.39 (m, 1H), 7.59-7.71 2H), 7.83-7.97 1H), 8.47 (d, 1H). Analytical HPLC 9.43min.

1- (4-Acetylmino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid (97b).

Prepared from 96b by treatment with TFA/ CH2C1 2 After complete reaction, the solvent is removed in vacuo and the residue repeatedly concentrated from toluene. The resulting residue was dried under vacuum to a constant weight.

156 4-Acetylamino-5-chloro-2-methoxy-benzoic acid.

4-Acetylamino-5-chloro-2-methoxy-benzoic acid methyl ester (2.09g, 8.11mmol) was dissolved in MeOH (110ml) and LiOH solution (25.48mmol in 30ml, 1:1 MeOH:H 2 0) added and the solution stirred at room temperature for 6hours. The solvent was concentrated in vacuo, EtOAc added and the organic phase was washed with 0.5N HC1 then extracted with saturated NaHC0 3 The aqueous phase was acidified with 12N HC1 to pH 1 and the resulting precipitate extracted into CH 2 C1 2 The combined extracts were dried over anhydrous Na 2

SO

4 filtered and evaporated to give the title compound as a white solid (0.933g, 50% yield). 1 H-NMR (500MHz, CDC13) 6 2.31 3H), 4.10 3H), 7.78-7.92 (br s, 1H), 8.17 1H), 8.45 1H). Analytical HPLC 5.62min.

1- 12- (4-Acetylamino-5-chloro- 2-methoxy-benzoylamino) propionyl]-pyrrolidine-2-carboxylic acid tert-butyl ester (96c).

To a solution of 95 (1.534g, 4.07mmol) in MeOH was added 10%Pd/C (650mg) and the mixture stirred under

H

2 for 2hours. The suspension was filtered through celite and evaporated to give a yellow oil. This was allowed to react with 4-acetyl-5-chloro-2-methoxy benzoic acid following the procedure used for the preparation of 96a to give the title compound (497mg, 52% yield). H-NMR (500MHz, CD 3 0D) 8 1.46 3H), 1.49 9H), 1.80-2.01 3H), 2.19-2.40 1H), 2.22 (s, 3H), 3.58-3.72 1H), 3.78-3.89 1H), 3.98-4.09 3H), 4.31-4.45 1H), 4.78-4.95 1H), 7.89- 8.10 2H). Analytical HPLC 11.31min.

157 1-[2-(4-Acetylamino-5-chloro-2-methoxy-benzoylamino)propionyl]-pyrrolidine-2-carboxylic acid (97c).

Prepared from 96c by treatment with TFA/ CH 2 C1 2 After complete reaction, the solvent is removed in vacuo and the residue repeatedly concentrated from toluene. The resulting residue was dried under vacuum to a constant weight

H

2 c CI 98a 1-[2-(4-Amino-3-chloro-benzoylamino)-propionyl]pyrrolidine-2-carboxylic acid (5-oxo-2-phenethyloxytetrahydro-furan-3-yl)-amide (98a).

To a solution of (5-oxo-2-phenethyloxy-tetrahydrofuran-3-yl)-carbamic acid allyl ester (194mg, 0.54mmol) (prepared as described for (40) using phenethyl alcohol) in anhydrous CH 2 C1 2 (5mL) at 0 C was added DMBA (196mg, 1.26mmol) and Pd(PPh 3 4 (32mg, 0.03mmol). The solution was stirred for 15min and a solution of 97a (prepared from 96a by treatment with TFA in

CH

2 C1 2 (166mg, 0.49mmol) and DIEA (680pl, 3.90mmol) in

CH

2 C12 (2mL) was added followed by HOBT (98mg, 0.73mmol) and EDC (122mg, 0.63mmol). The solution was stirred at OC for 15min then at room temperature for 18hours. The solvent was removed in vacuo and the residue dissolved in EtOAc then washed with 0.5N NaHS04 :2x saturated NaHCO 3 (2x) and brine. Dried over anhydrous Na-SO4 and evaporated to give an orange solid which was purified by flash column chromatography, 158 using CH2C1 2 /MeOH (99/1 to 97/3%) to yield the title compound as a white solid (190mg, 73% yield). 1

H-NMR

(500SMHz, CD 3 0D) 6 1.29 0.6H), 1.41 2.4H), 1.78 1H), 2.08 31), 2.56 1H), 2.77 (dd, 11), 2.94 2H), 3.53 0.3H), 3.67 0.8H), 3.85 (m, 2H), 3.96-4.08 1H), 4.40 2H), 4.62 1H), 4.67-4.79 1H), 5.57 0.7H), 5.60 0.3H), 6.78 (dd, 1H), 7.21 5H), 7.58 1H), 7.79 11), 8.26 1H). Analytical HPLC 14.52min. LC-MS (ES 4 m/e=543.2

H

2 N P 0 if ga H 98b 1- [2-(4-Amino-3-chloro-benzoylamino)-propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98b).

Was prepared from the syn diastereomer of (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester and 97a following the method used for 98a. The title compound was isolated as a pale yellow solid (720mg, 51% yield). IH-NMR (500MHz, CD 3 0D) 5 1.16 (d, 1.40 2.5H), 1.64-2.25 4H), 2.61 (dd, IH), 2.79 (dd, 1H), 3.37-3.59 11), 3.59-3.74 (m, 1H), 3.77-3.92 1H), 4.29-4.47 1H), 4.47-5.02 4H), 5.48 5.66 1H), 5.68 0.5H1), 6.79 11), 7.17-7.52 5H), 7.48-7.62 1H), 7.68-7.83(m, 1H). Analytical HPLC 15.98min. LC-MS (ES+) m/e=529.2 159 H2N'< O N 98c 1-[2-(4-Amino-3-chloro-benzoylamino)-propionyl]- S pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98c).

Prepared from the furan-3-yl)-carbamic acid allyl ester (40) and 97a following the method used for 98a. The title compound was isolated as a white solid (186.6mg, 46% yield).

H-NIMR (500MHz, CD30D) 6 1.30-1.52 3H), 1.76-2.33 Cm,4H), 2.41-2.59 2.90 (dd, 0.15H), 3.04 (dd, 0.85H), 3.44-3.75 1.5H), 3.82-3.95 11), 4.27- S4.42 2H), 4.42-4.56 0.5H), 4.56-4.86 4H), 5.42-5.55 1H), 6.79 1H), 7.21-7.42 4.6H), 7.54-7.63 1.4H), 7.76-7.83 0.65H), 8.60-8.68 0.35H). Analytical HPLC 15.19min. LC-MS (ES4) m/e=529.3 (MH) 0

H

2 N 0 cI H 98d 2-(Ethoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for (40) using 160 ethanol. Chromatography using hexane/ethyl acetate (95/5 to 80/20) gave 0.94 g of tetrahydro-furan-3-yl)-carbamic acid allyl ester (higher Rf), 1.96 g of syn diastereomer (lower Rf) and 8.08 g of the mixture of the diastereomers (total overall yield IH-NMR (500 MHz, CDC1) for the anti diastereomer: 5 1.13-1.31 3H), 2.31-2.45 (m, 1H), 2.92-3.08 1H), 3.52-3.72 3.78-3.92 11), 4.10-4.25 IH), 4.45-4.70 2H), 5.00 (bs, 11), 5.12-5.45 3H), 5.80-5.95 1H); for syn diastereomer 1.13-1.35 3H), 2.38-2.50 1H), 2.75-2.92 1H), 3.60-3.73 1H), 3.82-3.95 (m, 11), 4.40-4.70 3H), 5.10-5.52 4H), 5.80-5.94 IH); LC-MS: m/z 230 for both diastereomers.

1- [2-(4-Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98d).

Prepared from (2-ethoxy-5-oxo-tetrahydro-furan-3-yl)carbamic acid allyl ester and 97a following the method used for 98a. The title compound was isolated as a white solid (175mg, 77% yield). 1 H-NMR (500MHz, CD 3 0D) 1.13 0.5H), 1.23 2.5H), 1.36 0.5H), 1.44 2.5H), 1.75-2.38 4H), 2.56 (dd, 1H), 2.76 (dd, 1H), 3.45-3.97 51), 4.47 (dd, 1H), 4.59-4.67 (m, 1H), 4.74 5.55 0.2H), 5.56 0.8H), 6.75-6.82 m, 7.56 (dd, 11), 7.77 1H), 8.39 1H). Analytical HPLC 8.17min. LC-MS (ES*) C m/e=467.4 161 (2-Cyclopentyloxy-5-oxo-tetrahydro-furan-3-yl) -carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using cyclopentanol to afford the title compound as a mixture of diastereomers. Flash column chromatography using hexanes/EtOAc (90/10 to 80/20) afforded the syn diastereomer of the title compound: syn diastereomer IH NMR (500MHz, CDC13) 6 1.5-2.0 8H), 2.45 (dd, 1H), 2.81 (dd, 0.9H), 3.0 (dd, 0.1H), 4.31 1H), 4.59 (m, 4H), 5.23 1H), 5.32 1H), 5.45 0.1H), 5.51 0.9H), 5.92, 1H) ppm; anti diastereomer 1

H-NMR

(500 MHz, CDC13) 6 1.50 2H), 1.67 6H), 2.36 (d, 1H), 2.8 (dd, 0.08H), 2.96 (dd, 0.92H), 4.13 1H), 4.25 1H), 4.55 (br, 2H), 5.20 1H), 5.30 (m, 2H), 5.43 0.92H), 5.5 0.08H), 5.89 1H) ppm.

1- (4-Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98e).

Prepared from 3-yl)-carbamic acid allyl ester and 97a following the method used for 98a to give the title compound (280mg, 51% yield). 1 H-NMR (500MHz, CD30D) 5 1.38 1.44 2.5H), 1.49-2.35 12H), 2.47 (dd, 0.7H), 2.56 (dd, 0.3H), 2.75 (dd, 0.3H), 2.81-2.88 0.1H), 2.97 (dd, 0.6H), 3.47-3.76 0.2H), 3.82-3.96 (m, 162 1H), 4.10-4.40 21), 4.40-4.46 1H), 5.44 (d, 5.50 0.2H), 5.65 0.3H), 6.79 1H), 7.54-7.64 1H), 7.78 1H), 8.21-8.31 1H).

Analytical HPLC 15.02, 15.34min. LC-MS m/e=507.3 S (MH+) No CI H H 1 98f I 2 -Cyclhexyloxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using cyclohexanol to afford the title compound as a mixture of diastereomers (pale yellow oil) (4.62g, 85% yield).

Flash column chromatography using hexanes/EtOAc (90/10 to 80/20) gave 394 mg yield) of the syn diastereomer of the title compound. 1H NMR (500MHz, CDC1 3 6.1.11-2.09 101), 2.35-2.61 (dd, 1H), 2.72- 2.98 (dd, 11), 3.60-3.83 1H), 4.32-4.72 3M), 5.06-5.43 2H), 5.60 1H), 5.82-6.03 1H).

1-12- (4-Acetylamino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98f).

Prepared from furan-3-yl)-carbamic acid allyl ester and 97b following the method used for 98a to give the title compound 121im, 33 yield). H-NMR (500MHz, CD30D) 5 1.06-1.61 in. 9H), 1.61-2.37 7H), 2.22 3H), 2.52-2.81 (m, 2 2 .45-3.78 tm, 2H), 3.84-3.57 1H), 4.42-4.57 163 IH), 4.57-4.69 1H)1, 5.67-5.81 (in, 11), 7.72- 7.89 Cm, 1H), 7.89-8.12 2H). Analytical HPLC 9.84min. LC-MS m/e=563.3 0

HNH

98g 1-12-(4-Amino-3-chloro-benzoylamino)-propionyl]pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-azride (98g).

Prepared from syn-( 2 furan-3-yl)-carbaiic acid allyl ester and 97a following the method used for 98a to give the title compound (153mg, 47% yield). 'H-NMR (50OMHz, CD 3 OD) 5 1.06-2.38 -14H), 1.42 3H), 2.50-2.66 IH), 2.69-2.82 Cdd, 1H), 3.06-3.75 3.80-3.94 IH), 4.40- 4.52 11), 4.57-4.65 4.70-4.80 1H), 5.72 Cd, 1H),-6.71 1H), 7.50-7.63 1H), 7.78 (d, 0.6H), 8.42 0.4H). Analytical HPLC 10.30min. LC-MS m/e=521.2 0 H~ 2N CI H 98h K- '.-mino-3-chloro-benzoylamino)-propionyljry&rz ne-2-:arboxvlic acid (2-ethoxy--oxo ran-3 -vi l;-amide C98h) 164 Prepared from (2-ethoxy-5-oxo-tetrahydro-furan-3-yl)carbamic acid allyl ester and 97a following the method used for 98a. The title compound was isolated as a white solid (195mg, 82% yield). H-NMR (500MHz, CD 3 0D) 6 1.32-1.55 3H), 1.58-1.77 3H), 1.98-2.54 (m, 4H), 2.68-2.76 0.3H), 2.79-2.89 0.7H), 2.96- 3.10 0.7H), 3.18-3.27 (dd, 0.3H), 3.72-4.18 (im, 4H), 4.46-5.12 3H), 5.60 0.4H), 5.74-5.84 (m, 0.6H), 7.03 0.8H), 7.75-7.86 1H), 8.01(d, 0.7H), 8.35 0.3H), 8.74 0.2H). Analytical HPLC 8.31min. LC-MS m/e=467.3 (MH).

0 l N

N

H

2 N i C1 H 98i (5-Oxo-2-(tricyclo3.3.1.1 0 0 ]dec-2-yloxy)-tetrahydrofuran-3-yll-carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using 2adamantanol (6.21g, 5 equivalents) to afford the title compound as a pale yellow oil (1.52g, 61% yield). H NMR (500MHz, CDC1 3 )..1.38-2.22 14H), 2.40 (d, 0.2H), 2.53 (dd, 0.7H), 2.87 (dd, 0.7H), 2.87 (dd, 0.8H), 3.00-3.12 0.3H), 3.84-3.97 11), 4.40- 4.71 3H), 5.18-5.44 2H), 5.53-5.69 1H), 5.82-6.02 1W).

1- (4-Amino-3-chloro-benzoylamino)-propionyl] pyrrolidine-2-carboxylic acid [5-oxo-2- 165 (tricyclo[3.3.1.1' 0 dec-2-y1orY -tetrahydrofuran3.y1I amide (98i).

Prepared from [-oxo-2-tricvclo[3.3 1. 10Ojdec-2 yloxy) -tetrahydro-furan-3-y] -carbamic acid allyl ester and 97a following the method used for 98a. The title compound was isolated as a white solid C76mo, 13% yield). 1 1-NMR (500MHz, CD 3 OD) 1.38-2.22 Cm, 14H) 2.40 Cd, 0.2H), 2.53 Cdd, 0.7H), 2.87 (dd, O.81), 3.00- 3.12 Cm, 0.3H), 3.84-3.97 1H), 4.40-4.71 3R)f, 5.18-5.44 21-f, 5.53-5.69 111), 5.82-6.02 (m, 1H). Analytical HPLC. 11.S9mjn. LC-MS (ES t m/e= 573.2 0 K N A Yr N J 4 NH 0N 98j 1- 4 -Acetylamino- 5-chlcro -2-me thoxy -benzoylarnino.) propionyl -pyrrolidine-2-carboxylic acid (2-benzyloxy- S-oxo-tetrahydro-furan-3-yl)-amide (98j).

Prepared from sy2n-{2-[2- 2 furan-3-ylcarbamoyl) -pyrrolidin-a-ylj -l-methyl-2-oxoethyll-carbamic acid tezt-butyl ester and 97c following the procedure used for 98a to afford the title compound (222mg, 82% yield). 1 1-N4R (500MHz,

CD

3 OD) 6 1.23 (d, 0.6H), 1.42 2.4H), 1.72-2.27 4H), 2.23 (s,23), 2z 2.63 dd, 1H), 2.77-2.88 Cm, 114), 3.43-3.52 Cm,1.SHf, 3.74-3.5 11), 3.98 Cs, 211) (3E-4.So m, 1.5W), 4.51-4.92 4.5 5.63-576 (m, -7 5HI, 7.97 Cs, IRH, 8.45 1 166 8.69-8.80 11) Analytical EPLC 11.63min LC-MS (ES*) m/e= 601.2 (M11).

K2NC Ci H 98k Synthesis of 1-12-(4-amino-3-chloro-benzoylaino)propionyl] -pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (98k).

Prepared from anti- (2-ethoxy-5-oxo-tetrahydro-furan-3yl)-carbamic acid allyl ester and 97a following the method used for 98a to afford 175 mg of title compound 'H-NMR (500 MHz, 1:1 CDCI 3

:CD

3 OD) 5 1.10-1.28 (m, 3H), 1.42 0.6H), 1.46 Cd, 2.4H), 1.75-2.45 Cm, 411), 2.45-2.70 11), 2.80-3.05 1H), 3.50-3.95 (m, 4H)V 4.20-4.75 Cm, 3H), 4.75-4.90 1H), 5.32 (s, 0.8H), 5.38 0.2H), 6.80 11), 7.55-7.84 2H).

Analytical HPLC: 10.47 min. LC-MS (ES 4 m/e 467.3 0 C H 981 Synthesis of 1- 4 -amino-3,S-dichloro-benzoylamino) propionyl] -pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (981).

Prenared from. (2-ethoxv -5-oxo-tetrahvdro-furan-3-yl) carnamac acid ally! ester and 1-[2-(4-amino-3,5- -icncro-benzovlainoio -propionYi -pyrrolidine-2- 167 carboxylic acid tert-butyl ester according to the method used for 98a to afford 158 mg of title compound (54% yield) H-NMR (500 MHz, 1:1 CDC13:CD 3 0D) 6 1.08- 1.30 3H), 1.32-1.52 3H), 1.72-2.44 4H), 2.40-3.05 2H), 3.50-3.97 4H), 4.25-4.70 (m, 3H), 4.70-4.86 1H), 5.33 0.4H), 5.47 0.1H), 5.56 0.4H), 5.62 0.1H), 7.50 1H), 7.80 (s, 1H). Analytical HPLC: 10.84 min. LC-MS m/e 501.2 0 H 2

N

CI C 98 O 1- [2-(4-amino-3-chloro-benzoylamino)-propionyll pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98m).

Prepared according to the procedure used to prepare 98a using Cbz-Ala-D-pro-OH to afford 230 mg of title compound (69% yield). 1 H-NMR (.500 MHz, 1:1 CDC1 3

:CD

3 0D) 6 1.30 1.2H), 1.45 1.8H), 1.62-2.40 4H), 2.40-3.10 2H), 3.30-3.97 2H), 4.33-4.95 (m, 5.30 0.5H), 5.68 0.5H), 6.80 1H), 7.25-7.95 7H). Analytical HPLC: 11.56, 11.91 min.

LC-MS (ES 4 m/e 529.2 N 0 H 0 N98n

I

168 1-[2-(4-acetylamino-3-chloro-benzylamino)-propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98n) Prepared from 97b and tetrahydro-furan-3-yl)-carbamic acid ally, according to the procedure used to prepare 98a to afford 210 mg of title compound (64% yield). H-NMR (500 MHz, 1:1 CDC1 3 :CD30D) 5 1.33 0.6H), 1.44 2.4K), 1.68-2.40 Cm, 4H), 2.26 3H), 2.55-3.05 Cm, 2H), 3.40-3.90 (m, 4.20-4.95 5H), 5.68 0.8H), 5.84 0.2H), 7.15-8.30 8H). Analytical HPLC: 15.67 min. LC-MS (ES m/e 571.1 0 H 2 Nr 0 98o O1 (2-Isopropoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester Prepared as described for compound 40 using isopropanol to afford 3.80 grams (81% yield) of the title compound as a colorless oil. H-NMR (500 MHz, CDC1 3 5 1.10-1.35 6H), 2.32-2.60 1H), 2.82 (dd, 0.5H), 3.02 (dd, 3.82-4.11 1H), 4.48-4.66 3H), 5.20-5.36 2H), 5.54 (dd, 1K), 5.82-6.05 1H). LC-MS

(ES

4 m/e 244.2 (M+H t 1- 12-(4-amino-3-chloro-benzoylamino)-propionyl] pvrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (980) Prezarec frzrv. 97a and (2-isopropoxy-S-oxo-tetrahvdrofuran-E-l -carbarrmic acid allyl ester according tc the 169 procedure used to prepare 98a to afford 200 mg of title compound (66% yield). 1 H-NMR (500 MHz, 1:1 CDC13:CD 3 0D) 6 1.05-1.35 6H), 1.35-1.50 3H), 1.70-2.45 (m, 4H), 2.45-3.05 2H), 3.55-4.10 3H), 4.15-4.88 4H), 5.48 0.4H), 5.58 0.1H), 5.64 (d, 0.4H), 5.70 6.78 1H), 7.58 1H), 7.80 1H). Analytical HPLC: 12.19, 12.40 min. LC-MS m/e 581.2 (M+H 4 a 10 98 C."ct 4 propionyl]-pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (98p).

Prepared from 1-[2-(4-acetylamino-3,5-dichlorobenzoylamino)-propionyl]-pyrrolidine-2-carboxylic acid tert-butyl ester and furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 230 mg of title compound (72% yield). 1H-NMR (500 MHz, 1:1 CDC1 3

:CD

3

D)

S1.36 0.6H), 1.47 2.4H), 1.68-2.47 4H), 2.23 3H), 2.60-3.15 2H), 3.40-3.90 (mn, 2H), 4.15-4.95 5H), 5.68 5.84 0.2H), 7.20-7.98 7H). Analytical HPLC: 13.07 min. LC-MS m/e 605.1 (M+H 170 1- [2-(4-acetylamino-3-chloro-benzoylamino)-propionyllpyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98q).

Prepared from 97b and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 215 mg of title compound (69% yield). H-NMR (500 MHz, 1:1 CDC13:CD30D) 8 1.35-1.90 11H), 1.90- 2.35 4H), 2.24 3H), 2.40-3.10 2H), 3.50- 3.95 3H), 4.15-4.90 3H), 5.44 0.55H), 5.56 0.15H), 5.64 0.22H), 5.71 0.08), 7.70-8.25 3H). Analytical HPLC: 12.13 min. LC-MS m/e 549.2 0 I 0 CH C 98r

H

Synthesis of 1-12-(4-acetylamino-3-chlorobenzoylamino)-propionyl]-pyrrolidine-2-carboxylic acid (2-ethoxy-5-oxo-tetrahydro-furan-3-yl)-aide (98r).

Prepared from 97b and furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 68 mg of title compound 1 H-NMR (500 MHz, 1:1 CDC1 3 :CD30D) 6 1.13 0.6H), 1.28 2.4H), 1.38 0.6H), 1.48 (d, 2.4H), 1.75-2.40 4H), 2.22 3H), 2.55-2.88 (m, 21, 3.50-3.92 4H), 4.40-4.90 3H), 5.57 (d, 0.811 5.61 d, 0.2H1), 7.60-8.20 3H). Analytical HPLC: E.64 min. LC-MS m/e 509.2 1 I_~l_-LI lr-X-XI_ I 1 ii Il- I L71 C1 Bp4s HbY~ Preparation of 2 S turan-3-yl)-carbaaic acid allyl mster.

Prepared from 3 -allyloxycar-bonylamino-# -hydroxy-butyric acid rert-butyl ester as described for compound using cyclopentylmethanol 1.6.5 iL, 60 mmol) to afford 2,98 grams (52% total yield) of the title compound as a mixture of epimers. Purification provided 0.97 grams (37% yield) of the SiR) as a colorless oil- 1H NMR a500 MHz, CDC1 3 8 1.19 Cm, 2H), 1.54 4H), 1.71 2H), 2.16 Cm, 11), 2.44 (dd, J=17-2, 10.4Hz, 1E).

2-82 (dd, a=17.2, 8.4Hz, HR), 3-44 (dd, 39.3. 7.2Hz, 1W). 3.71 (dd, J=93, 7.2HZ, 4.57 Cm, 31), 5.32 (in, 3H), S.C1 J=5.2Hz, 1H), 5.91 (ddr, J=17. 10-4, 5Hz. 1H) ppm. LC-MS. m/e=284.

Also isolated was epimer mixture (0-66 gram 11k yield) and the 5(5) epimer 11.35 gram, 24t yield) as a waxy solid. 1 H-NMR (500MHZ, CDC1 3 8 1.20 211), 1.54 4H), 1.69 2H), 2.10 11), 2.37 Cd, J lHz.

1H), 2.97 (4d, J=18-0, 7.6Hz, 1H), 3.42 (dd, T=7.3, 177Hz, IH), 3.49 2H). 3-64 (dd. J=9.0, 7.3Hz. 1H), 4.19 (br, 1H), 4.55 2H), 5.25 Cm, 2H), 5.36 (s, 5.87 11) ppm. LC-P4S T/e=284 1- (-aino-3-chlaro-benrcylaao) -propionyl] pyrroidiaie-2-carboxylic acid (3 .yclopctylt ozy- oxo-tetrahydro-furan-3-yl)-amide (98a), 172 Prepared from 97a and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 195 mg of title compound (51% yield). 1H- MR (500 MHz, 1:1 CDC13:CD30D) 6 1.15-1.90 11H), 1.90- 2.40 SH), 2.55-2.78 21), 3.50-3.90 4H), 4.38-4.92 31H), 5.53 0.81), 5.57 0.211), 6.78 1H), 7.50-8.15 2H). Analytical HPLC: 10.48 min. LC-MS (ES m/e 521.2 (M+HI)

H

H 2

NJ

10 N C 8t H 0 (5-oxo-2-(3-phenyl-propoxy)-tetrahydro-furan-3-yl)carbamic acid allyl ester.

Prepared from 3 -allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for compound using 3-phenylpropanol to afford 1.15 grams (32% yield) of the title compound as a colorless oil. 1H-NMR (500 MHz, CDC1 3 6 1.82-2.05 2H), 2.38 (dd, 1H), 2.68 (m, 22), 2.82 (dd, 1H), 3.55-3.65 1H), 3.82-3.92 (m, 1H), 4.48-4.72 3H), 5.12-5.59 3H), 5.82-6.03 11), 7.11-7.45 5H). Analytical HPLC: 9.08 min.

LC-MS m/e 320.2 (4-amino-3-chloro-benzoylamino)-propionyl pyrrolidine-2-carboxylic acid (5-oxo-2-(3-phenylpropoxyl)-tetrahydro-furan-3-yl) -amide (98t) Prepared from 97b and syn-(5-oxo-2-(3-phenyl-propoxyl)- :e:trahvdro-furan-3-.l)-carbamic acid allyl ester accordin :c the procedure used to prepare 98a to afford 200 ma of title compound (57% yield). H-NMR 173 (500 MHz, 1:1 CDC1 3

:CD

3 0D) 6 1.34 0.6H), 1.44 (d, 2.4H), 1.75-2.40 6H), 2.50-2.95 4H), 3.47-3.95 4H), 4.38-4.82 3H), 5.52 0.8H), 5.56 (d, 0.2H), 6.75-8.25 8H). Analytical HPLC: 10.79 min.

LC-MS m/e 557.2 (M+H H C 98u Synthesis of 1- [2-(4-acetylamino-3-chlorobenzoylamino)-propionyll -pyrrolidine-2-carboxylic acid (2-cyclopentylmethoxy-5-oxo-tetrahydro-furan-3-yl)amide (98u).

Prepared from 97b and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 215 mg of title compound (67% yield). 1

H-NMR

(500 MHz, 1:1 CDC1 3 :CD30D) 8 1.38 0.6H), 1.47 (d, 2.4H), 1.11-1.88 8H), 1.92-2.40 5H), 2.24 (s, 3H), 2.53-2.86 2H), 3.30-3.90 4H), 4.38-4.89 3H), 5.53 5.60 0.2H), 7.68-8.22 (m, 3H). Analytical HPLC: 9.90 min. LC-MS m/e 563.3 (M+H 0 CI H (4-acetylamino-3-chloro-benzoylamino)-propionyl] pyrrolidine-2-carboxylic acid (5-oxo-2-(3-phenylpropoxyl)-tetrahydro-furan-3-yl)-amide (98v).

174 Prepared from 1- [2-(4-acetylamino-3-chlorobenzoylamino)-propionyl]-pyrrolidine-2-carboxylic acid tert-butyl ester and syn-(5-oxo-2-(3-phenyl-propoxyl)tetrahydro-furan-3-yl)-carbamic acid ally, ester according to the procedure used to prepare 98a to afford 238 mg of title compound (75% yield). 1

H-NMR

(500 MHz, 1:1 CDC1 3

:CD

3 0D) 6 1.33 0.6H), 1.56 (d, 2.4H), 1.78-2.45 6H), 2.27 3H), 2.53-2.97 (m, 4H), 3.53-3.94 4H), 4.47-4.86 3H), 5.53 (d, 0.8H), 5.62 0.2H), 7.11-8.26 8H). Analytical HPLC: 10.27 min. LC-MS (ES t m/e 599.2 H2N 0H T Ho NN CF3 9w 0--l- 1- 4-amino- 3 trifluoromethyl-benzoylamino) propionyl] -pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (98w).

Prepared from [2-(2-benzyloxy-5-oxo-tetrahydrofuran-3-ylcarbmoyl)-pyrrolidin--yl]-1-methyl-2-oxoethyl}-carbamic acid tert-butyl ester and 4-amino-3trifluoromethyl-benzoic acid according to the procedure used to prepare 98a to afford 56 mg of title compound (48% yield). 'H-NMR (500 MHz, 1:1 CDC1 3

:CD

3 0D) 6 1.20- 1.55 3H), 1.75-2.50 4H), 2.50-3.10 2H), 3.50-4.00 2H), 4.30-5.00 5H), 5.42 0.4H), 5.51 0.2H), 5.62 0.3H), 5.78 0.1H), 6.84 1H), 7.20-8.15 7H). Analytical HPLC: 14.90, 15.20 min. LC-MS m/e 563.2 (M+H 175 1- 12- (3 -chloro 4-dime thylamino -benz oylamino) prop ionyl]I -pyrrolidine -2 -carboxylic acid (2 -benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (98x) Prepared from (2-benzyloxy-S-oxo-Letrahydroturan-3-ylcarbnoyl) -pyrrolidin-1-y.) -1-inetbyl-2-.oxoethyl)-carbamic acid tert-butyl ester and 3-chloro-4dimethylainino-benzoic acid according to the procedure used to prepare 98a to afford 82 mng of title compound (44% yield) 1 M-NMR (500 MHz, 1:1 CDC1 3

:CD

3 OD) 8 1.18- 1.53 (mn, 3H1), 1.70-2.40 (in, 4H1), 2.55-3.10 (in, 2H1), 2.84 6H1), 3.45-3.94 (in, 2H1), 4.25-4.95 (mn, SM), 5.46 0.3H) 5.51 0.21) 5.63 0.41) 5.73 0. 1H1), 7. 05 1H) 7. 15 95 (mn, 7H). Analyt ical HPLC: 11.85, 12.19 Min. LC-MS in/e =557.3 (M-Hf).

F H8 1- 12- (4-dimethylamaino-3,5S-dif luoro-benzoylamino) propionyl] -pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro--furan-3-yl) -amide {98y).

Prepared from furan-3-ylcarbnoyl) -pyrrolidin-1-yl] -1-iethyl-2-oxoethyl}-carbanic acid tert-butyl ester and 4dime thylainno- 3, -dichloro-benzoic acid according to 176 the procedure used to prepare 98a to afford 106 mg of title compound (65% yield) 1 H-NMR (500 MHz, 1:1 CDC13:CD30D) 5 1.10-1.55 3H), 1.75-2.30 4H), 2.45-3.15 2H), 2.84 6H), 3.40-3.95 2H), 4.15-4.95 5H), 5.47 0.35H), 5.54 0.15H), 5.67 0.4H), 5.77 0.1H), 7.20-7.70 7H).

Analytical HPLC: 12.21, 12.51 min. LC-MS (ES) m/e 559.2 (M+H F O F N

H

HN F 0 N 1-12-( 4-amino-2,3,5,6-tetrafluoro-benzoylamino)propionyl -pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (982).

Prepared from (2-[2-(2-benzyloxy-5-oxo-tetrahydrofuran-3-ylcarbmoyl)-pyrrolidin-1-yl]-1-methyl-2-oxoethyl}-carbamic acid tert-butyl ester and 4-amino- 2,3,5,6-tetrafluoro-benzoic acid according to the procedure used to prepare 98a to afford 58 mg of title compound (73% yield). 1 H-NMR (500 MHz, 1:1 CDC1 3

:CD

3 0D) 1.30-1.50 3H), 1.62-2.35 4H), 2.45-3.12 (m, 2H), 3.50-3.90 2H), 4.20-4.95 5H), 5.42 (s, 0.4H), 5.52 0.11), 5.64 0.4H), 5.82 0.1H), 7.25-7.65 5H). Analytical HPLC: 16.56, 16.90 min.

LC-MS m/e 567.2 (M+H 4 0 H; H 177 1-{2-13-chloro-4-(2,2-dimethylpropionylamino)benzoylamino-propionyl}7pyrrolidine-2-carboxylic acid (2-benzylory-5-oxo-tetrahydro-furan-3-yl)-amide (98aa) To a suspension of 98b (100 mg, 0.19 mmol) and poly(4vinylpyridine) (200 mg) was added pivaloyl chloride (704L, 0.57 mmol). The resulting suspension was stirred overnight at room temperature the filtered and diluted with EtOAc (25 mL). The organic layer was washed with NaHCO3 (2 x 25 rmL) saturated NaC1 (1 x 25 mL), dried (MgS04), and evaporated to dryness to afford 98 mg of title compound (85% yield) after chromatography.

1H-NMR (500 MHz, 1:1 CDC1 3 :CD30D) 6 1.10-1.55 3H), 1.38 9H), 1.65-2.40 4H), 2.60-3.10 2R), 3.46-3.88 2H), 4.20-4.95 5H), 5.62 0.8H), 5.78 0.2H), 7.15-8.30 8H). Analytical HPLC: 11.82 min. LC-MS m/e 613.2 0 N CT H 0I Na 1-[2-(3-chloro-4-propionylamino)-benzoylamino)propionyl]-pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (98ab).

Prepared from 98b and propionyl chloride according to the procedure used to prepare 98aa to afford 104 mg of title compound (95% yield). 'H-NMR (500 MHz, 1:1 CDC1 2

CD

3 0D) 6 1.16 0.6H), 1.18 0.6H), 1.27 t, 2.4H), 1.38 2.4H)- 1.72-2.35 4H), 2.45-2.58 (m, 2Ft, 2.58-3.05 2H), 3.45-3.85 2H), 4.20-4.88 5H), 5.64 d. 0.2SF), 5.76 0.2H), 7.20-8.35 (m, BC An alvtic:al HPLC: 9.89 min. LC-MS m/e 585.2 CM(F h.

178 1- (3-chloro-4-phenylacetylamino)-benzoylamino)propionyl-pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (98ac).

Prepared from 98b and phenylacetyl chloride according to the procedure used to prepare 98aa to afford 85 mg of title compound (77% yield). IH-NMR (500 MHz, 1:1 CDC1 3

CD

3 0D) 6 1.18 0.6H), 1.40 2.4H), 1.72- 2.38 4H), 2.58-3.05 2H), 3.46-3.78 2H), 3.85 2H), 4.18-4.92 5H), 5.63 0.81), 5.75 0.2H), 7.15-8.34 13H). Analytical HPLC: 11.63 min. LC-MS m/e 647.2 0 0 N H CI Nd ad 1- (3-chloro-4-methyl-butyrylamino) -benzoylamino) propionyll -pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide (98ad).

Prepared from 98b and isovaleryl chloride according to the procedure used to prepare 98aa to afford 60 mg of title compound (58% yield). 1H-NMR (500 MHz, 1:1 CDC1 3

:CD

3 0D) 8 1.07 5H), 1.15 0.8H), 1.27 (d, 11), 1.45 2.2H), 1.67-2.30 5H), 2.34 2H), 2.58-3.05 2H), 3.48-3.88 2H), 4.10-4.98 (m, 5.68 0.7H), 5.78 0.3H), 7.18-8.33 8H).

179 Analytical HPLC: 10.74 min. LC-MS (ES 4 in/e 613.2 N ~y

H

9Bae 1- (4-Hethoxcy-3,5-dilethyl-belzoylilo) -propionyl) pyrrolidine-2-carboxy2-ic acid tetrahydro-fural-3-y.) -amiide MSae).

Prepared from 1- C4-inethoxy-3, benzoylamino) -propionyll -pyrrolidine-2-carboxylic acid tert-butyl ester and syn- furan-3-yl)-carbanic acid allyl ester according to the procedure used to prepare 98a to afford 174 mng (81t yield) of the title compound. 'n-Mm (500 MHz, aDC1 3 5 1. 04 Ct, 0. 45H) 1. 27 2.55H) 1. 34 -1.45 3H) 1.95-2.45 (mn, 1OH), 2.78-2.84 3.60-3.90 (m, 8H1), 4.50-4.70 2H1), 4.90-4.94 (in, 5.45 (d, 0.85H1), 5.61 0.1511), 6.99 H1), 7.15 7.45 Cs, 2H1); retention time on analytical HPLC: 10.09 min; LC-MS: in/z 476 CM+H+).

HN0

H

Hal 1- (4-Methoxy-3, 5-dinethY1-beZOY1cfilD) -propionyl] pyrrolidine-2-carboxyliC acid (2-ethoxy-S-oxotetrahydro-furan-3-yl) -amide (S8at).

Prepared fromr a- C4-iethoxv-3,S-diinethylbenzovlan~flcl -propionyl] -pvrrolidine-2-car-boxylic acid 180 tert-butyl ester and anti-( 2 furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 168 mg (77% yield) of the title compound. 1 H-NMR (500 MHz, CDC1 3 6 1.10-1.35 3H), 1.35-1.60 3H), 1.90-2.45 (m.

2.60-3.00 3.55-3.95 81), 4.15-4.60 2H), 4.83-5.00 5.29 6.95-7.06 (m, 7.50 2H), 7.92 retention time on analytical HPLC: 10.14 min; LC-MS: m/z 476 0

N

0 0 0 S8ag (4-Methoxy-3, 5-dimethyl-benzoylaino) -propionyll pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98ag).

Prepared from 1- [2-(4-methoxy-3 benzoylamino)-propionyl) -pyrrolidine-2-carboxylic acid tert-butyl ester and syn-( 2 furan-3-yl)-carbamic acid allyl ester (40) according to the procedure used to prepare 98a to afford 406 mg (yield 71%) of the title compound. 1H-NMR (500 MHz, CDC13): 6 1.09 0.6H), 1.35 2.4H), 1.90-2.20 (m, 3H), 2.22-2.50 10H), 2.84-2.90 3.52-3.62 1.6H), 3.65-3.80 4.10-4.40 4.50- 4.75 3H), 4.82-4.95 2H), 5.54 0-8H), 5.80 0.2H), 6.87 7.10-7.40 6H), 7.45 (s, retention time on analytical HPLC: 16.71 min; LC- MS: m/z 538 181 1- [2-(4-Allyloxy-3,5-dimethyl-benzoylaumino)-propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98ah).

Prepared from L4-allyloxy-3,5-dimethylbenzoylamino)-propionyli-pyrrolidine-2-carboxylic acid tert-butyl ester and 40 according to the procedure used to prepare 98a to afford 264 mg (yield 46%) of the title compound. 1 H-NMR (500 MHz, CDC1 3 6 1.09-1.43 3H), 1.90-2.20 3H), 2.20-2.38 7H), 2.38- 2.52 2.80-2.95 3.52-3.67 3.70- 3.80 4.10-4.40 2H), 4.40-4.95 5.26-5.55 (mn, 3H), 6.00-6.14 6.87 7.10- 7.70 8H); retention time on analytical HPLC: 18.56 and 18.92 min; LC-MS: m/z 564 0 N

N

HH

98ai H (2-[1R-(2S-Isopropyl-5R-methyl-cyclohexyloxy) tetrahydro-furan-3-yl)-carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using (1R, 2S, 5R)-(-)-menthol to afford 0.32 g of syn diastereomer (lower Rf) of the title compound and 4.25 182 g of the mixture of anti/syn diastereomers (overall yield H-NMR (500 MHz, CDC1 3 mixture: 5 0.70- 1.05 13H), 1.20-1.47 2H), 1.60-1.80 2H), 1.94-2.20 2H), 2.35-2.50 2.82-3.04 H), 3.40-3.61 4.43-4.70 3H), 5.15-5.35 2H), 5.48-5.61 5.90-5.94 for syn diastereomer 0.70-1.05 13H), 1.20-1.47 2H), 1.60-1.80 2H), 1.94-2.18 2H), 2.40-2.50 H), 2.82-2.92 3.54-3.61 4.45-4.70 3H), 5.18-5.35 2H), 5.58-5.61 5.90-5.93 H); LC-MS: m/z 340 for the mixture of anti/syn diastereomers.

4-Benzyloxy-3,5-dimethyl-benzoic acid.

Prepared by the method used to synthesize 4-allyloxyacid to afford 2.43 g (yield 56%) of the title compound. H-NMR (500 MHz, CDC1 3 6 4.87 2H), 7.36-7.48 5H), 7.92 2H); LC-MS: m/z 255 (M-H t 1-1 2- (4-Benzyloxy-3,5-dimethyl-benzoylamino)propionyl]-pyrrolidine-2-carboxylic acid (2-1iR-(2Sisopropyl-SR-methyl-cyclohexyloxy) furan-3-yl}-amide (98ai).

Prepared from 1-[2-(4-benzyloxy-3,5-dimethylbenzoylamino)-propionyl) -pyrrolidine-2-carboxylic acid tert-butyl ester 2 cyclohexyloxy) -5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 130 mng (yield 39%) of the title compound. 'H-NMR (500 MHz, CDC1 3 5 0.45-1.10 (m, 12H), 1.15-1.90 8H), 1.90-2.45 12H), 2.80-2.84 3.50-3.85 3H), 4.45-4.70 2H), 4.80-4.95 3H), 5.62 1H), 7.05 7.17 7.30- 183 7.60 7H), 7.62-7.75 retention time on analytical HPLC: 15.90 and 16.08 min; LC-MS: m/z 662 (M+H Hi

HO

98aj 1- (4-Hydroxy-3,5-dimethyl-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid [1R- methyl-cyclohexyloxy) ]-5-oxo-tetrahydro-furan-3-yl}amide (98aj).

A solution of 1-[2-(4-benzyloxy-3,5-dimethylbenzoylamino) -propionyl] -pyrrolidine-2-carboxylic acid {2-[1R-(2S-isopropyl-5R-methyl-cyclohexyloxy)]-5-oxotetrahydro-furan-3-yl}-amide (110 mg, 0.17 mmol) in ethyl acetate (2 mL) was stirred with 10% palladium on carbon (20 mg) under hydrogen atmosphere for 24 hours then filtered through Celite and evaporated in vacuo.

The resulting residue was purified by chromatography using CH 2

C

2 l/methanol (99/1 to 96/4) to afford 58 mg of the title compound. H-NMR (500 MHz, CDC1 3 6 0.70- 1.00 10H), 1.20-1.80 10H), 1.90-2.40 11H), 2.82-2.86 3.57-3.78 3H), 4.55-4.67 2H), 4.90-4.94 5.29 5.62 6.90 (d, 7.14 7.42 2H); retention time on analytical HPLC: 12.84 and 13.05 min; LC-MS: m/z 572 184 Ho- TV HO 98ak H 0N 1- (2-(4-Hydroxy-3,5-dimethyl-benzoylamino)-propionyl pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98ak).

A solution of 98ah (230 mg, 0.41 mmol) in CH 2 C1 2 mtL) was treated with DMBA (65 mg, 0.42 mmol) and Pd(PPh3) 4 (50 mg) at room temperature for 20 hours.

The mixture was concentrated to dryness in vacuo and purified by flash chromatography using CH2C1 2 /methanol (99.5/0.5 to 97/3) to afford 181 mg of the title compound. H-NMR (500 MHz, CDC1 3 5 1.08 0.75H), 1.20-1.35 2.25H), 1.70-2.50 12H), 2.80-2.90 (m, 3.50-3.65 3.70-3.80 (mn, 4.10-4.25 (m, 4.35-4.98 3H), 5.53 0.75H), 5.85 (d, 0.25H), 6.81 7.13-7.60 8H); retention time on analytical HPLC: 10.38 and 10.56 min; LC-MS: m/z 524 M8al H 0 1- 2- (4 -Dimethylamino-benzoylanino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98al).

Prepared from 1-[2-(4-dimethylamino-benzoylamino)propionyll-pyrrolidine-2-carboxylic acid tert-butyl 185 ester and syn-(2-benzyloxy-5-oxo-tetrahydro-furan-3yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 60 mg yield) 1H-NMR (500 MHz, CDC1 3 6 1.04 0.75H), 1.35 2.25H), 1.80-2.50 51), 2.75-3.20 8H), 3.45-3.75 2H), 4.05-4.20 0.5H), 4.30-4.80 (m, 4.80-4.95 1.5H), 5.52 5.75-6.00 (m, 6.60-6.90 3H), 7.10-7.50 4H), 7.50-7.80 21); retention time on analytical HPLC: 10.46 min; LC-MS: m/z 523 (M+H

H

2 N N CI HX 9 8 a m

C

1- (4-Amino-3-chloro-benzoylamino)-propionyl pyrrolidine-2-carboxylic acid {2R-1IR-(2S-isopropyi-5Rmethyl-cyclohexyloxy)] -5-oxo-tetrahydro-furan-3-yl}amide (98am).

Prepared from 1- [2-(4-amino-3-chloro-benzoylamino)propionyl]-pyrrolidine-2-carboxylic acid tert-butyl ester (97a) and syn-{2-[1R-(2S-isopropyl-5R-methylcyclohexyloxy) -5-oxo-tetrahydro-furan-3-yl}-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 103 mg (yield 67%) of the title compound. 1 H-NMR (500 MHz, CDC13): 6 0.70-1.10 (m, 12H), 1.20-1.50 51), 1.50-1.85 2H), 1.90-2.30 5H), 2.75-2.85 3.50-3.70 2H), 3.70-3.82 4.20-4.65 4H), 4.80-4.95 5.61 (d, 6.70-6.73 6.95 7.15 7.49- 186 7.51 7.73 retention time on analytical HPLC: 12.88 min; LC-MS: m/z 577 CI 98a H 1S-( 2 R-Isopropyl-5S-methyl-cyclohexyloxy) tetrahydro-furan-3-yl)-carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using (iS, 2R, SS)-(+)-menthol to afford 855 mg of anti diastereomer (higher Rf) of the title compound, 503 mg of syn diastereomer (lower Rf) and 459 mg of the mixture of anti/syn diastereomers (overall yield 66%).

H-NMR (500 MHz, CDC1 3 anti diastereomer: 8 0.74-1.00 12H), 1.20-1.45 2H), 1.58-1.72 2H), 1.98- 2.12 21), 2.18-2.40 2.98-3.03 3.49- 3.54 4.17 (br, 4.59 (br, 2H), 4.97 (br, H), 5.22-5.33 2H), 5.58 5.87-5.93 for syn diastereomer 0.75-1.02 12H), 1.25-1.45 2H), 1.57-1.70 2H), 2.00-2.16 2H), 2.40-2.52

H),

2.78-2.90 3.40-3.50 4.58 Cbr, 2H), 5.24-5.35 2H), 5.51-5.52 5.85-5.98

H);

LC-MS: m/z 340 (M+H4) for both of diastereomers, 4 -Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid {2R-[IS-(2R-isopropy-5Smethyl-cyclohexylaxy)J-5-xo-tetrahydro-furan-3-yl} amide (98an).

187 Prepared from 97a and syn-(2-[IS-(2R-isopropyl-5Smethyl-cyclohexyloxy)]-5-oxo-tetrahydro-furan-3-yl}carbamic acid allyl ester according to the procedure used to prepare 98a to afford 88 mg (50% yield) of the title compound. 1 H-NMR (500 MHz, CDC1 3 5 0.70-1.10 12H), 1.20-1.50 14H), 1.50-1.70 (br, 2H), 1.90- 2.25 4H), 2.27-2.37 2.40-2.50 2.75- 2.79 3.35-3.80 3H), 4.20-4.57 3H), 4.60-4.70 4.88-4.92 5.53 6.71- 6.75 6.90 7.20 7.50-7.53 (m, 7.75 retention time on analytical HPLC: 13.20 min; LC-MS: m/z 577 (M+H 4 CH 98ao H (2-Cyclohexylmethoxy-5-oxo-tetrahydro-furan-3-yl)carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using cyclohexylmethanol to afford 1.04 g (higher RF) yield) of anti diastereomer of the title compound and 1.295 g (lower Rf) (44% yield) of syn diastereomer. H- NMR (500 MHz, CDC1 3 for anti diastereomer: 5 0.90-0.96 2H), 1.10-1.30 3H), 1.55-1.85 6H), 2.37- 2.41 2.97-3.03 3.34-3.38 3.58- 3.62 4.55-4.70 2H), 4.70-4.73 5.03 (bs, 5.22-5.37 3H), 5.87-5.93 for syn diastereomer 0.91-0.97 2H), 1.10-1.31 3H), 1.56-1.90 7H) 2.44-2.48 H) 2.81-2.87 H), 3.35-3.39 3.63-3.67 4.53-4.70 3H), 188 5.20-5.50 3H), 5.89-5.95 LC-MS: m/z 298 for both of diastereomers.

1- (4-Acetylamino-3-chloro-benzoylamino)-propionyl pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (98ao).

Prepared from 97b and syn- tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 212 mg (64% yield) of the title compound. 'H- NMR (500 MHz, CDC1 3 6 0.70-1.30 SH), 1.30-1.85 (m, 9H), 1.85-2.60 8H), 2.75-3.00 3.10-3.80 (m, 4H), 4.30-4.95 3H), 5.42 0.85H), 5.62 (d, 0.15), 6.87 0.15H), 7.08 0.85H), 7.25 H), 7.60-7.90 3H), 8.08 0.15H), 8.50 0.85H); retention time on analytical HPLC: 11.81 min; LC-MS: m/z 577 (M+11).

N N H 98ap H 1-1 [2-(4-Acetylamino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid {2R-[1S-(2R-isopropyl-5Smethyl-cyclohexyloxy)]-S-oxo-tetrahydro-furan-3-yl}amide (98ap).

Prepared from 97b and syn-{2-[1S-(2R-isopropyl-5Srethyl-cyclohexyloxy)--oxoX-tetrahydro-furan-3-ylcarbamic acid allyl ester according to the procedure used to prepare 98a to afford 223 mg (63% yield) of the title compound. 1 H-NMR (500 MHz, CDC1 3 6 0.70-1.15 189 12H), 1.20-1.85 8H), 1.85-2.60 9H), 2.74- 2.88 3.35-3.85 3H), 4.40-4.55 4.65- 4.78 4.88-4.91 5.53 7.00-7.25 2H), 7.60-7.90 3H), 8.50 retention time on analytical HPLC: 13.31 min; LC-MS: m/z 619 H2N

N

H~ NN CI 98aq

H

1- [2-(4-Amino-3-chloro-benzoylamino)-propionyll pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (98aq).

Prepared from 97a and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 113 mg (56% yield) of the title compound. H- NMR (500 MHz, CDC1 3 5 0.70-1.35 5H), 1.35-1.90 (m, 8H), 1.90-2.20 3H), 2.30-2.60 2.80-3.00 (m, 3.15-3.80 4H), 4.28-4.75 4H), 4.89-4.93 (m, 5.42 6.74 6.87 7.30 H), 7.51-7.53 7.74 retention time on analytical HPLC: 12.02 min; LC-MS: m/z 535 H 2 N N C1 98ar H (2-Butoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester.

190 Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using nbutanol to afford 878 mg (29% yield) of the title compound (313 mg of anti diastereomer, 260 mg of syn diastereomer and 305 mg of the mixture). 1 H-NMR (500 MHz, CDC1 3 for anti diastereomer: 6 (higher Rf) 0.89- 0.96 3H), 1.32-1.40 2H), 1.54-1.63 2H), 2.37-2.41 2.98-3.04 3.55-3.60

H),

3.77-3.82 4.19-4.22 4.58 (br, 2H), 5.03 (br, 5.23-5.40 3H), 5.87-5.93 for syn diastereomer (lower Rf) 0.91-0.95 3M), 1.34-1.39 2H), 1.56-1.63 2H), 2.42-2.50 2.83-2.87 4.07-4.11 4.45-4.50 0.5H), 4.51- 4.70 2.5H), 5.23-5.35 21), 5.42-5.43

H),

5.80-5.95 LC-MS: m/z 258 (M+H for both of diastereomers.

1- 4 -Amino-3-chloro-benzoylamino) -propionyl] PYrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98ar).

Prepared from 97a and syn-( 2 furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 118 mg (48% yield) of the title compound as a syn diastereomer.

H-NMR (500 MHz, CDC13): 6 0.80-1.02 2H), 1.35-1.51 51), 1.51-1.70 2H), 1.90-2.27 3H), 2.30- 2.46 2.80-2.90 3.55-3.94 4H), 4.30- 4.75 4H), 4.90-5.00 5.44-5.46 6.73- 6.80 6.80-6.93 7.16-7.25 7.49- 7.60 7.70-7.84 retention time on analytical HPLC: 9.71 min; LC-MS: m/z 495 191 (2-Isobutoxy-5-oxo-tetrahydro-furan-3-yl)-carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester as described for 40 using isobutanol to afford 190 mg (yield of the title compound as an anti diastereomer and 290 mg (yield 11%) of the syn diastereomer. IH-NMR (500 MHz, CDC1 3 for anti diastereomer: 8 (higher Rf) 0.85-1.05 6H), 1.82-1.98 2.37-2.42 2.98-3.04 H), 3.31-3.35 3.55-3.58 4.20-4.30 H), 4.58 (br, 2H), 5.07 (br, 5.22-5.43 3H), 5.84- 5.96 for syn diastereomer (lower Rf) 0.85-1.05 6H), 1.88-1.95 2.40-2.51 2.83-2.90 3.33-3.36 3.61-3.65 3.87-3.88 4.40-4.68 3H), 5.20-5.40 2H), 5.42-5.43 5.80-5.97 LC-MS: m/z 258 for both of diastereomers.

1- 12- (4-Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98as).

Prepared from 97a and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 93 mg (38% yield) of the title compound. H-NMR (500 MHz, CDC1 3 6 0.74-0.76 0.6H), 0.80-1.00 (m, 5.4H), 1.40-1.50 3H) 1.90-2.22 3H), 2.33-2.45 2.80-2.90 3.32-3.38 H) 3.55-3.80 192 3H), 4.38 (br, 4.50-4.60 4.70-4.80 (m, 4.90-5.00 5.42-5.45 6.74-6.76 (d, 6.86-6.88 7.31-7.33 7.51-7.53 (m, 7.74-7.75 retention time on analytical HPLC: 9.63 9.80 min; LC-MS: m/z 495 (M+H 4 0

H

2 N 0 C 98at [2-(indan-2-yl)oxy-5-oxo-tetrahydro-furan-3-yl]carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester (5.2 gram, 20 mmol) as described for 40 using 2-indanol (8.05 gram, 60 mmol) to afford 4.10 grams (65% yield) of the title compound as a mixture of epimers. Purification provided 1.76 gram (28% yield of the 5(R) epimer as a yellow oil.

IH NMR (500 MHz, CDCl 3 6 2.42 (dd, J=17.2, 10.5Hz, 1H), 2.79 (dd, J=17.2, 8.4Hz, 1H), 2.99 (dd, J=16.7, 4.1Hz, 1K), 3.04 (dd, J=16.7, 4.1Hz, 1K), 3.22 (dd, J=17.2, 6.6Hz, 1H), 3.26 (dd, J=17.2, 6.6Hz, 1H), 4.53 3H), 4.70 in), 5.20 2H), 5.60 J=5.3Hz, 1i), 5.87 1H), 7.17 4H) ppm. LC-MS m/e=318 Analytical HPLC (CIS column): 17.094 min.

Also isolated was epimer mixture (0.75 gram, 12% yield), and the 5(5) epimer (1.59 gram, 25%) as a white solid. H-NMR (500MHz, CDCl 3 52.38 J=17.9Hz, 1H), 3.0 3H), 3.22 2H), 4.13 1i), 4.58 (m, 2E), 4.68 2H), 4.98 (br s, 1H), 5.26 1i), 5.57 ks, 1H), 5.88 (ddt, J=18.0, 11.1, 5.4Hz, 1i), 7.20 (m, 193 4H) ppm. LC-MS m/e=318 CM+H) Analytical HPLC (CIS colunhn:l7. 025 17.325 (94 min.

1- 12- (4 -amnino-3 -chloro-beizoylamino) -propianyl] pyrrolidine-2 -carboxylic acid (indan- 2-yloxy) -5 -oxotetrahydro-fnran-3-yl] -amide (9Bat) Prepared from 97a and Cindano-2-yljoxy-s-oxotetrahydro-furan-2-yl) -carbamic acid allyl ester according to the procedure used to prepare 98a to afford the title compound as a 71:29 mixture of epirners as an off-white solid (0.20g, 58t yield) I H-NMR (500 MHz, CDCl 3 5 1-0-1.5 3H1), 1.6-2.3 411), 2.42 (m, 11H), 2.6-3.4 6H1), 3.5-4.1 3H1), 4.2-4.9 411), 5.65 Cd, J=5.OHz, 0.80H1), 5.8 0.07H1), 5.85 Cd, J=5.ORz, 0.13H1), 6.8-7.3 6H1), 7.4'-7.9 3H1) ppm.

Analytical HPLC (018 column) 16.035 (71.4t), 16.476 (28.6t) min. LC-MS m/e=555 CM-iH).

S1 9au H 1- (4-Acetylazaino-3-ch:loro-benzoylamino) -propionylJ pyrrolidine-2-carboxylic acid {indan-2-yloxy) tetrahydro-furan-3-ylJ -amide (9Bau).

Prepared from 97b and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford the title compound as a 76:24 mixture of epirners as an off-white solid (0.22g, 57k yield) 1 H-NNR (500 MHz, CDCl 3 6 -1.08 J=6.9HZ, 0.411), 1.26 J=6.911z, 194 1.35 J=6.9Hz, 2R), 1.8-2.3 3H), 2.28 (s, 2H), 2.29 11), 2.4 IH), 2.8 12H), 3.10 (m, 2H), 3.27 2H), 3.58 2H), 3.69 1H), 4.5-4.9 (mn, 4H), 5.65 J=5.3Hz, 0.68H), 5.84 J=5.3Hz, 0.18H), 6.38 (br, 0.14H), 6.9-7.7 6H), 7.6-7.9 (m, 3H), 8.33 (br d, J=6.8Hz, 0.18H), 8.51 (br d, J=B.0Hz, 0.82H) ppm. Analytical HPLC (C18 column) 15.596 15.932 min. LC-MS m/e=597 0

H

2 N 00N 98av

H

1- 4 -amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-anide (98av).

Prepared from 97a and tetrahydro-furan-3-yl)-carbamic acid allyl ester according to the procedure used to prepare 98a to afford the title compound as an off-white solid (0.19g, 59% yield). 2 H-NMR (500 MHz, CDC1 3 6 1.2-2.4 2.4-3.1 2H), 3.6-3.9 2H), 4.2-4.4 (min, 2H), 4H), 5.40 J=5.0Hz, 0.35H), 5.55 (d, 0.655), 6.8-8.2 51) ppm. Analytical

HPLC

(Ca18 column) 14.065 min. LC-MS m/e=507 0 II H C1 faw H 195 1- 12- S-Dichloro-4-hydroxy-benzoylamino) -propionyll pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide C9BawJ.

Prepared from 1- 4 benzoylamino)-propionyl)-pyrrolidine-2-carboxylic acid tert-butyl ester and syn-40 according to the procedure used to prepare 98a to afford the title compound as a pale yellow solid C1.087g, 64% yield). 1 H-NMR (500MHz, CDC1 3 6 1.09 3=6.9Hz, 0.6H), 1.33 Cd, J=6.SHZ, 2.4H), 1.96 Cm, 1H), 2.03 1H) 2.10 1H), 2.28 0.8MH) 2.40 Cdd, J=17.3, 10.2Hz, 0.8H), 2.56 (m, 0.2H), 2.85 Cdd, J=17.3, B.SHz, 0.81), 3.09 (dd, J=17.7, 10.2Hz, 0.2H), 3.57 1W), 3.73 Cdt, J=9.2, 7.9Hz, 0.8H), 4.09 Cm, 0.2H), 4.21 3=7.9Hz, 0.2H), 4.44 3=9.8Hz, 0.2H), 4.55 (dd, 3=8.0, 3.0Hz, 0.81), 4.62 Cd, 3=11.6Hz, 111), 4.70 1W), 4.80 Cm, IH), 4.89 Cd, 3=11.6Hz, 0.8H), 5.52 Cd, J=5.2Hz, 0.8W), 5.82 3=5.2Hz, 0.2H), 6.51 Cbr, 0.2H), 6.62 Cbr, 0.81), 7.0-7.4 7H), 7.43 Cs, 0.4H), 7.66 J=1.OHz, 1.6W) ppm. Analytical HPLC (C18 column) 10.135 min. LC- MS CES) m/e= 564, 566 '0 N CI 98ax

H

(4-Amino-3-chloro-benzoylaino) -propionyl) pyrrolidine-2-carboxylic acid C 2 tetrahydro-furan-3-yl)-amiae (98ax).

Prepared according to the procedure used to prepare (98ev) using anti- 2 -cyclopentyloxy-5-oxo-<etrahydr 0 furan-3-yl)-amide to afford the title compound as an 196 off-white solid (0.24 g, 74% yield). 'H-NMR (500MHz, CDC1 3 6 1.41 J=6.5Hz, 3H), 1.7 7H), 1.98 (br, 2H), 2.13 (br, 2H), 2.27 1H), 2.69 1H), 2.86 (dd, J=18.0, 6.8Hz, 0.7H), 2.98 (dd, J=18.3, 8.2Hz, 0.3H), 3.60 (br, 1.4H), 3.77 (br, 0.6H), 4.1-4.6 (m, 4.82 1H), 5.27 0.65H), 5,51 J=5.3Hz, 0.05H), 5.59 (br s, 0.3H), 6.76 (br, 1H) 7.00 (br, 1H), 7.49 (br, 1H), 7.74 (br, 1H), 7.89 (br, 1H) ppm.

Analytical HPLC (C18 column) 9.756 min. LC-MS m/e=507 0 O 98ay 1- (4-Acetylamino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (98ay).

Prepared from (2-ethoxy-5-oxo-tetrahydro-furan-3-yl)carbamic acid allyl ester and 97b following the method used for 98a. The title compound was isolated as a white solid (51 mg, 18% yield). 1 H-NMR (500MHz, 1:1 CDC1 3 :CD30D) 6 1.08-1.35 3H), 1.35-1.55 3H), 1.75-2.44 4H), 2.26 3H), 2.44-3.07 2H), 3.48-3.97 2H), 4.18-4.92 5H), 5.32 0.4H), 5.47 0.IH), 5.58 0.4H), 5.64 0.1H), 7.70- 8.35 3H). Analytical HPLC 10.37, 10.54 min. LC-MS (ES m/e= 509.2 197

H

2 N- T

N

C1

H

98az [2-(2-Chloro-ethoxy)-5-oxo-tetrahydro-furan-3-yl)carbamic acid allyl ester.

Prepared from 3-allyloxycarbonylamino-4-hydroxy-butyric acid tert-butyl ester (5.2g, 20 mmol) as described for using chloroethanol (4.05mL, 60 mmol) to afford 1.84g (35% yield) of the title compound as a mixture of epimers. For the anti-diastereomer: 'H-NMR (500 MHz, CDCB3) 5 2.42 (dd, 3=18.1Hz, 18), 3.00 (dd, J=18.1, 7.8Hz, 18), 3.63 2H), 3.85 1H), 4.02 18), 4.23 1H), 4.57(br s, 2H), 5.17 (br s, 1H), 5.22 (d, H=11.5Hz, 18), 5.29 J=16.8Hz, 18), 5.44 1H), 5.89 1H) ppm; LC-MS m/e= 264 For the syn-diastereomer: IH-NMR (500 MHz, CDC13) 6 2.47 (dd, J=17.3, 10.7Hz, 18), 2.83 (dd, J=17.3, 8.4Hz, 18), 3.65 2H), 3.83 1H), 4.11 1H), 4.57 3H), 5.22 Cd, H=10.4Hz, 1H), 5.30 Cd, J=17.2Hz, 1H), 5.33, (m, 1H), 5.47 J=5.2Hz, 1H), 5.89 (ddt, J=17.1, 11.0, 5.4Hz, 1H) ppm; LC-MS m/e= 264 [2-(2-Morpholin-4-yl-ethoxy)-5-axo-tetrahydro-furan-3yl)-carbamic acid allyl ester.

Is prepared from [2-(2-chloro-ethoxy)-5-oxo-tetrahydrofuran-3-yl-carbamic acid allyl ester by reaction with morpholine (2 eq) and KI (1 eq) in DMF.

198 1- 12- (4 -Amino -3 -chlcro-benzoylamino) -propionyl] pyrrolidine-2-carbocylic acid C2-morpholin-a-ylethoxy)-5-oxo-tetrahydro-fran-3-yl -amide (S8az) Is prepared from 97a and syn-L2-(2-morpholin-4-ylethoxy) -5-oxo-tetrahydro-furan-3-yl] -carbamic acid allyl ester following the method used for 98a.

0 N N0 CH r 98ba 4 -Chloro-benzyloxy)-5-oxo.tetrahydro-furan-3-yl carbamic acid allyl ester Prepared from 3 -allyloxycarbonylamjno-4-hydroxy-butyric acid tert-butyl ester as described for 40 using 4chlorobenzylaacohoa to afford the title compound as a is white solid. Anti-diastereomer: HPLC (CIS column) 10.524 min; I -NR (500 MHz, CDCl 3 5 2.41 J=8.OHz, 1W), 3.02 (dd,'J=18.i, 7.8Hz, iN), 4.25 (br, 1H), 4.56 2H),4.58 J=11.7Hz, IH), 4.79 J=11.7Hz,

IH),

4.99 (br, iN), 5.22 (dd, J=10.4, 1.1Hz, 1H), 5.28 (dd, J=17.2, 1.3Hz, IH), 5.44 Cs, iN), 5.86 iN), 7.25 J=8.4Hz, 2H), 7.32 J=8.4Hz, 2H) ppm; LC-MS m/e=326 Syn-diastereomer: NPLC (CIB column) 10.780 min; IH-NMR (500 MHz, CDCl 3 5 2.47 Cdd, J=17.3, 10.5Hz, IH), 2.85 (dd, J=17.3, 8.4Hz, 1H), 4.55 3N), 4.58 .=11.7Hz, 1H), 4.84 J=11.7Hz, iH), 5.23 (dd, H=10.-4, 1.1Hz, iN), 5.30 J=16.6Hz, 1H), 5.49 J=5.OHz, iN), 5.89 Cddt, J=17., 11.0, 5.4Hz, 1H), 7.23 J=8.3Hz, 2H), 7.31 Cd, J=8.3 2 2H) ppm; LC-MS m/e= 326 199 1- [2-(4-Amino-3-chloro-benzoylanino)-propionyll pyrrolidine-2-carboxylic acid [2-(4-chloro-benzyloxy)- 5-oxo-tetrahydro-furan-3-yll-amide (9Bba).

Prepared from 97a and syn-[2-(4-chloro-benzyloxy)-5oxo-tetrahydro-furan-3-yl-carbamic acid allyl ester following the method used for 98a to afford 154 mg yield] of the title compound as a pale pink solid.

HPLC (C18 column) 10.597 min; 1 H-NMR (500 MHz, CDC1 3 1.14 J=6.8Hz, 0.75H), 1.34, J=6.8Hz, 2.25H), 1.6 (br, 0.25H), 1.91 1H), 2.03 11), 2.10 (m, 1H), 2.29 0.75H), 2.40 (dd, J=17.3, 10.3Hz, 0.75H), 2.51 0.25H), 2.82 (dd, J=17.3, 8.5Hz, 0.75H), 3.08 (dd, J=17.9, 10.9Hz, 0.25H), 3.58 11), 3.72 (dd, J=16.5, 8.7Hz, 0.75H), 4.10 0.25H), 4.22 (d, J=8.0Hz, 0.25H), 4.39 J=10.8Hz, 0.25H), 4.54 (dd, J=9.1, 2.9Hz, 0.75H), 4.60 J=11.9Hz, 0.75H), 4.68 11), 4.85 J=11.7Hz, 0.75H),'4.86 11), 5.49 J=5.2Hz, 0.75H), 5.81 J=5.2Hz, 0.25H), 6.2 (br, 0.25H), 6.74 2H), 7.05 J=8.5Hz, 0.5H), 7.17 (d, J=8.4Hz, 0.5H), 7.30 3.25H), 7.48 (dd, J=8.4, 0.75H), 7.56 J=1.9Hz, 0.25H), 7.73 (d, J=1.9Hz, 0.75H), 8.42 J=5.7Hz, 0.25H) ppm; LC-MS m/e=563, 565 98b Sb H 98bb 200 1- 1[2-(4-Acetylamino-3-chloro-benzoylamino)-propionyl] pyrrolidine-2-carboxylic acid [2-(4-chloro-benzyloxy)- 5-oxo-tetrahydro-furan-3-yl]-amide (98bb).

Prepared from 97b and syn-[ 2 oxo-tetrahvdro-furan-3-yl]-carbamic acid allyl ester according to the procedure used to prepare 98a to afford 165mg (64i yield) of the title compound as pale yellow solid. HPLC (C18 column) 10.491 min; 2 H-NMR (500 MHz, CDC 3 5 1.16 J=6.8Hz, 0.6H), 1.35, (d, J=6.8Hz, 2.4H), 1.94 1H), 2.04 18), 2.10 (m, 1H), 2.25 3H), 2.28 1H), 2.40 (dd, J=17.3, 10.4Hz, 0.8H), 2.53 0.2H), 2.84 (dd, J=17.3, 0.8H), 3.02 (dd, J=17.5, 10.5Hz, 0.2H), 3.58 3.72 (ddd, J=17.2, 8.3, 8.3Hz, 0.88), 4.13 0.2H), 4.22 J=8.2Hz, 0.2H), 4.40 J=10.9Hz, 0.2H), 4.54 (dd, J=8.1, 3.0Hz, 0.8H), 4.60 J=11.8Hz, 0.8H), 4.69 1H), 4.85 J=11.8Hz, 0.8H), 4.87 1H), 5.49 J=5.2Hz, 0.8H), 5.80 J=5.2Hz, 0.2H), 6.47 (br, 0.2H), 6.95 J=B.3Hz, 0.8H), 7.05 J=8.3Hz, 0.48), 7.18 J=8.3Hz, 0.4H), 7.29 3.2H), 7.49 (dd, J=8.6, 1.9Hz, 0.2H), 7.63 (dd, J=8.6, 1.9Hz, C.8H;, 7.7.4 J=1.9Hz, 1H), 7.85 J=1.9Hz, 0.8H), 8.25 J=6.4Hz, 0.2H), 8.51 0.8H) ppm; LC-MS m/e=605, 607 201 Scheme XVIII 4, CO2H O NJ 99 H 100 N Bo..N oA 0 H O H C1 H 102a, Y=AcNH 101 102b, Y=NH 2 2-(2-Benzyloxy-5-axo-tetrahydro-furan-3-ylcarbamoyl) piperidine-1-carboxylic acid-tert butyl ester (100).

Prepared from piperidine-1,2-dicarboxylic acid 1-tertbutyl ester 99 and 40 following the method used in the preparation of 75 to give the title compound as a yellow solid (2.63g, 57% yield). 1 H-NMR (500MHz, CDCl 3 1.15-1.79 15H), 2.12-2.50 2H), 2.56-2.83 (m, 1H), 2.89 (dd, 0.5H), 3.05 (dd, 0.5H), 3.81-4.15 (br s, 1H), 4.36-4.97 3H), 5.37-5.61 6.42-6.89 (br s, 11), 7.17-7.51 5H). LC-MS m/e=419.4

(MHW).

(2-[2-(2-Benzyloxy-5-oxo-tetrahydr-furan-3ylcarbamoyl)-piperidin-1-yll -1-methyl-2-axo-ethyl}carbamic acid tert-butyl-ester (101).

2-(2-Benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbamoyl)piperidine-1-carboxylic acid tert-butyl ester (100) was dissolved in 20% TFA in CH 2 C1 2 (25mL) and stirred at 202 room temperature for 50min. The solvent was evaporated and the residual acid azeotroped with CH 2 C1 The resulting oil was dissolved in CH2C1 2 (20mL) and DMF cooled to 0OC and treated with DIEA (4.7mL, 27.0mmol), Boc-alanine (970mg, 5.lmmol), HOBT (924mg, 6.8mmol) and EDC (1.31g, 6.8mmol) and the solution stirred under N 2 for 18hours. The solvent was concentrated in vacuo then dissolved in EtOAc and washed with 0.SN NaHS0 4 saturated NaHCO 3 (2x) and brine. The organic layer was dried over anhydrous Na 2

SO

4 and evaporated to give an orange solid that was dissolved in CH 2 C1 2 and added dropwise to diethyl ether to afford a white precipitate. The title compound as a white solid (1.21g, 73% yield). 2 H-NMR (500MHz, CDC1 3 6 1.10-1.79 18H), 1.98-2.19 0.5H), 2.28-2.88 3H), 2.89-3.13 0.53), 3.78-3.95 4.21-5.16 5.5H), 5.38-5.59 0.3H), 5.66 (d, 0.4H), 5.80 0.3H), 7.24-7.40 5H). LC-MS (ES*) m/e=490.3 1- [2-(4-Acetylamino-3-chloro-benzoylmino) -propionyl piperidine-2-carboxylic acid tetrahydro-furan-3-yl)amide (102a).

Prepared from{2-[2-( 2 3-ylcarbamoyl)-piperidin-1-yl] methyl-2-oxo-ethyl carbamic acid tert butyl ester and 4-acetylamino-3chlorobenzoic acid by the procedure used in the preparation of 98a to give the title compound (71mg, 47% yield). 1H-NMR (500MHz, CDC1 3 6 1.10-1.97 (m, 10H), 2.10-2.68 5H), 2.73-3.24 2H), 3.62-3.92 1H), 4.24-5.27 5H), 5.48-5.59 0.5H), 5.75- 5.85 0.5H), 6.51-6.61 1H), 7.05-7.45 4H), 203 7.52-8.12 4H). Analytical HPLC 8.30min. LC-MS (ES*) m/e=585.3 (MH 1- 4 -Amino-3-chloro-benzoylamino) -propionyl] piperidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (102b).

Prepared as above for 102a to give the title compound (0.06g, 27% yield) as a yellow solid. 1 H-NMR (500MHz, CDCl 3 61.2-1.8 7H), 2.1-2.6 2H), 2.7-3.2 (m, 4H), 3.6-4.0 1H), 4.3-4.9 7H), 5.0-5.8 2H), 6.5-7.0 2H), 7.2-7.8 8H) ppm. Analytical HPLC (cyano column) 14.559 15.198

LC-MS-

m/e=543 (M+H) Scheme XIX P H C0 2

H

103 CbN

B

106 HN

COJB-N

C!

H

SCO

2 Bu-t 104

CO

2 Bu-t 204 4-Hydroxy-pyrrolidine-1,2-dicarboxylic acid 1-benzyl ester 2-tert-butyl ester (104).

Compound 104 was prepared according to the procedure used to prepare compound A suspension of Cbz-Hyp-OH (4.854g, 18mmol) in DMA (135ml), benzyltriethylammonium chloride (4.105g, 18mmol), K 2

CO

3 (64g, 46mmol) and 2-bromo-2methylpropane (99ml, 859mmol) was stirred at 55 C for 18hours. The mixture was diluted with iced water and extracted with EtOAc The organic phase washed with water, 0.5N NaHS0 4 solution and brine dried and the solvent in vacuo to yield the title compound as a yellow oil (5.368g, 98% yield). 1H-NMR (500MHz, CDC1 3 1.33 5H), 1.47 4H), 2.01-2.14 1H), 2.22- 2.38 1H), 3.50-3.72 2H), 4.34-4.45 1H), 4.45-4.53 1H), 5.04-5.20 2H), 7.22-7.42 (m, Analytical HPLC 10.14min. LC-MS m/e=322.2

(MH

4-Fluoro-pyrrolidine-1,2-dicarboxylic acid 1-benzyl ester 2-tert-butyl ester (105).

A solution of 104 (4.262, 13.96mmol) in CH 2 C1 2 (100ml) at -78 0 C was treated with DAST (1.80ml, 13.6mmol), stirred for 10min then warmed to room temperature and stirred for 60h under N 2 The mixture was poured into iced NaHC0 3 (10% solution, 350ml) and extracted with

CH

2 C1 2 The organic phase was washed with water, brine, dried over anhydrous Na 2

SO

4 and concentrated to give a brown oil (4.299g) which was purified by flash column chromatography on silica gel using hexanes/EtOAc (90/10 to 80/20%). The title compound was obtained as a 205 yellow oil (2.805g, 64% yield). IH-NMR (500MHz, CDC1 3 6 1.37 4.5H), 1.45 4.5H), 2.20-2.55 2H), 3.61-3.93 2H), 4.41 0.5H), 4.49 5.03-5.21 3H), 7.23-7.44 5H). Analytical HPLC 12.15min. LC-MS m/e=324.2 (MH) 1- (2-Benzyloxycarbonylamino-propionyl) -4-fluoropyrrolidine-1,2-dicarboxylic acid l-benzyl ester 2tert-butyl ester (106).

A solution of 105 (2.72g, 8.42mmol) in MeOH (50ml) and Pd/C (1.27g) was stirred under H 2 for 2hours then filtered through celite and the solvent evaporated to give a yellow oil (1.526g). This oil was dissolved in CH2C12 (30ml) and treated with DIEA (1.5ml, 8.6mmol), Cbz-ala-OH (2.34g, 10.5mmol) and EDC (2.32g, 12mmol) at O0C. The mixture was stirred an additional 10min at o°C then allowed to warm to room temperature and stir for 18hours. The solvent was concentrated in vacuo and the residue dissolved in EtOAc then washed with NaHSO 4 saturated NaHCO 3 (2x) and brine. The organic layer was dried over anhydrous Na 2

SO

4 and evaporated to give a white solid which was purified by flash column chromatography, eluting using hexanes/EtOAc (80/20 to 60/40%). The title compound was isolated as a white solid (286g, 86% from 4-fluoropyrrolidine-1,2-dicarboxyllc acid 1-benzyl ester 2tert-butyl ester). -H-NMR (500MHz, CD 3 0D) 51.26-1.59 12H), 2.20-2.67 2H), 3.45-4.13 2H), 4.25- 4.47 1H), 4.58-4.71 1H), 4.96-5..17 2H), 5.19-5.45 1H), 7.23-7.48 5H). Analytical HPLC 16.36min. LC-MS (ES m/e=395.3 (MH 4 206 1- (4-Amino-3-chloro-benzoylamino) -propionyl] -4fluoro-pyrrolidine-2-carboxylic acid-tert-butyl ester (107).

A suspension of 106 (2.65g, 6.72mmol) in MeOH and 10% Pd/C (1.32g) was stirred under an atmosphere of

H

2 for 1.5hours, filtered through celite and the concentrated to give a waxy solid (1.694g). The solid was dissolved in CH 2 C1 2 (25ml) and treated with DIEA (3.4ml, 19.5mmol), 4-amino-3-chlorobenzoic acid (1.362g, 7.9mmol), HOBT (1.164g, 8.62mmol) and EDC (1.645g, 8.57mmol) at 0 C under N 2 The mixture was allowed to warm to room temperature and stirred for 18hours. The solvent was concentrated in vacuo. The residue was dissolved in EtOAc, washed with water (4x), 0.5N NaHSO 4 saturated NaHCO 3 (2x) and brine. The organic layer was dried over anhydrous Na 2 S0 4 and evaporated to give a white solid which was purified by flash column chromatography, using CH 2 C12/MeOH (99/1 to The product obtained as a white solid (2.705g, 1 H-NMR (500MHz, CD 3 0D) 61.33(s, 9H), 1.48 (d, 3H), 2.31-2.55 2H), 3.93 1H), 4.02-4.21 (m, 1H), 4.59-4.76 1H), 5.31 (br s, 0.5H), 5.41 (br s, 6.78 1H), 7.57 1H), 7.78 1H), 8.31 1H). Analytical HPLC 14.14min. LC-MS (ES') m/e=414.2 (MH).

F

H 2

N

V t0 207 1-[2-(4-Amino-3-chloro-benzoylamino)-propionyll-4fluaro-pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-aaide (108a).

Prepared from 3-yl)-carbamic acid allyl ester and 107a following the method used for the synthesis of 98a. The title compound was isolated as a white solid (41mg, yield). 'H-NMR (500MHz, CD 3 0D) 6 0.94 0.3H), 1.07 1H), 1.40 1.7H), 2.21-2.65 2.2H), 2.70-2.85 1.4H), 2.96-3.08 1.4H), 2.96-3.08 (dd, 0.4H), 3.57-4.24 4.41-4.93 4H), 5.14-5.45 1), 5.60-5.67 0.6H), 5.77 0.4H), 6.77 (dd, 1H), 7.15-7.41 51), 7.51-7.62 7.77 (dd, 1H).

Analytical HPLC 12.83min. LC-MS m/e= 547.1 (Mf).

F

Ny N 0

H

2 N c00I CI H 108b 1- [2-(4-Amino-3-chloro-benzoylanino)-propionyll-4fluoro-pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (108b).

Prepared from (2-benzyloxy-5-oxo-tetrahydro-furan-3yl)-carbamic acid allyl ester 107a following the method used for the synthesis of 98a. The title compound was isolated as a white solid (654mg, 54% yield). 1

H-NMR

(500MHz, CD 3 0D) 6 1.07 0.5H), 1.25-1.56 2.21-2.65 2.3H), 2.68-2.89 11), 2.91-3.10 (m, 0.7H), 3.57-4.23 2H), 4.32-4.95 5S), 5.16-5.52 1H), 5.45-5.50 0.3H), 5.54-5.58 0.2H), 5.61-5.67 0.3H), 5.77 0.2H), 6.72-6.84 11), 208 7.16-7.41 SH), 7.50-7.65 IH), 7.71-7.87 (m, 1H). Analytical HPLC 12.83min. LC-MS m/e=547.1 (MH

F

H2N O N C1 H 108c 1- (4-Amino-3- chloro-benzoylanino) -propionyl] -4fluoro-pyrrolidine-2-carboxylic acid tetrahydro-furan-3-yl)-amide (108c).

Prepared from syn-(2-ethoxy-5-oxo-tetrahydro-furan-3yl)-carbamic acid allyl ester and 107a following the method used for the synthesis of 98a to give the title compound (100.3mg, 38% yield). 1 EH-NMR (500MHz, CD30D) 6 1.09 1.2H), 1.25 1.8H), 1.40 1H), 1.49 (d, 2H), 2.33-2.61 2H), 2.65-2.95 2H), 3.44-4.30 4H), 4.47-4.79 3H), 5.18-5.25 0.2H), 5.27- 5.36 0.5H), 5.39-5.46 0.3H), 5.56 1H), 6.72-6.94 0.8H), 7.54-7.69 0.8H), 7.79 (d, 0.55H), 8.06 0.55H), 9.00 0.3H). Analytical HPLC 8.46min. LC-MS m/e= 485.2 r 108d 209 1-[2-(4-Amino-3-chlor-benzoylamino)-propionyl]-4fluoro-pyrrolidine-2-arboxylic acid [2-(2-isopropyl-5methyl-cyclohexyl)-5-oxo-tetrahydro-furan-3-yl] -aide (108d).

Prepared from {2-[1R-(2S-Isopropyl-5R-methylcyclohexyloxy)] -5-oxo-tetrahydro-furan-3-yl -carbamic acid allyl ester and 107a following the method used for the synthesis of 98a to give the title compound 31% yield). 1H-NMR (500MHZ, CD30D) 6 0.42 2H), 0.57 2H), 0.60-1.10 10H), 1.22-1.76 6H), 1.96-2.17 1H), 2.29-2.60 (mn, 2H), 2.61-2.88 (m, 3.02-3.23 (dd, 3.37-3.47 0.5H), 3.50- 3.61 0.5H), 3.63-4.24 2H), 4.48-4.62 m, 3H), 5.18-5.48 1H), 5.72 0.4H), 5.82 0.6H), 6.77-6.84 11), 7.53-7.67 1H), 7.78 0.4H), 7.84 1H) Analytical HPLC 8.34min. LC-MS m/e= 595 Scheme XX N'YN? Allo

NH_

H C2H N 0

N

109 74

C

HN 0 I H

HOC

110 CIO2.-C -210- P Y r r o li d i n 1 y 1 l z t t l 2 o o e t y a b m c a i tert-butyl ester (109).

Prepared from

C

2 -erhoxvs..oxo-.tetrahydro-f za- carbainic acid ally, ester 74 following the method used in the synthesis of 75 to give the title compound as a Pale yell~w solid (660Mg, 73t yield) 1H-NMR (SOOMHz, CD300) S 1.14-1.36 6H), 1L.42 Cs, 1.75-2.29 (m, 4H), 2.48 (dd, o-SH), 2.58 (dd, 0.511), 2.72-2.85 (in, 0.5H), 2.99 (dd, 0.58), 3.33.. Cm, 4H), 4.745 2.5K), 4.53-4.72 0.58), 5.3*7 0.58), 5.57 Cd, 0.58). Anialytical HPLC (mixture of 2 diastereoners) 7.92, S.l4min. LC-Ms in/e=414.3 (148 1- 4 *AlY1Oxr-3S.*dichlo-,bnzblamn -propionyly PYrrolidine2-..arbox,1±c acid 2 -ethoxy-s-ox..

tetrahYdro.euran-3.yl) -anide (110).

Prepared from 109 and 4 -8llyloxy.35dichorobno acid following the method used in the synthesis of 82 to give the title compound as a white solid (228mg, 1H-N14R (500MB:,

CV

3 ,OD) 8 1. 10-1.30 Cm, 4H), 1.32-1.52 (in, 3H), 1.63-2.31 Cm, 4H), 2.41-2.50 (d, 2.52-2.61 Cdd, 0.58), 2.67-2.81 Cm, 0.98), 2.94- 3.05 (dd, 0.5H), 3.47-3.96 48), 4.21-4.81

SI{},

5.22-5.32 Cm, 18) 5.35-5.49 1.58), 5.55-5.63 Cm, 0.58), 6.06-6.21 Cmn, 11M), 7.90 Cs, 2H). Analytical IIPLC Cmixture of 2 diastereomers) 12 5 6min.

LC-MS

in/e=542 1- 5S-D±Chloro- 4 yIroxy.befhoyl amino) -Propionyll PYrrolidine-2-carbcxylic acid 2 -ethoxy-s-oxo.

211 To a solution of 110 (194mg, 0.36mmol) in CH2C12 was added DMBA (70.7mg, 0.45mmol) and Pd(PPh3)4 (50.3mg, 0.044mmol) at 0OC. The solution was warmed to room temperature after 15mins, stirred for 2hours, diluted with CH2C12 then washed with water (2x) and brine. The organic layer was dried over anhydrous Na 2 S0 4 and evaporated to give the crude product. Flash chromatography using CH 2 C12/MeOH (99/1 to 95/5%) afforded the title compound (138.6mg, 77% yield). 1

H-

NMR (500MHz, CD30D) 6 1.13-1.31 3H), 1.35-1.49 (m, 3H), 1.84-2.35 4H), 2.43-3.05 2H), 3.48-3.93 4H), 4.22-4.80 3H), 5.38 0.4H), 5.46 (s, 0.1H), 5.55-5.61 0.5H), 7.76-7.94 2H).

Analytical HPLC 8.70min. LC-MS (ES 4 m/e=502.2 (MH 212 Scheme XXI

PH

103 Cbz,

NN

114 z a N Nt

CO

2 Bu-t x 115a, X=CI, Y=NH 2

Z=H

115b, X=CI, V=AcNH, Z=H 115c, X=CI, Y=AcNH, Z=CH 3

O

0 1O-n 4 H 0 1163a-116h Compounds 116a- 116h were prepared as described above for compounds 98 only substituting l-(2benzyloxycarbolylamiflOprOpiOlYl)-4,4 -difluoropyrrolidine-2-'carboxylic acid ter-t-butyl ester (114) f or 1- (2 -benzyl oxyc arbOfl aminlo-PropiOlYl) -pyrrolidine- 2-carboxylic acid tert-butyl ester Preparation of 1- (2-benzyloxycarbonylamino-propionYl) 4, 4-difluoro-pyrrolidifle-2-CarbOXYliC acid tert-butyl ester (114).

A solution of 4,4-difluoro-pyrrolidifle-1,2-dicarboxyliC acid-1-benzyl ester- 2 -tert -bultyl ester (113) 213 (Karanewsky, et.al., J. Med. Chem. 33, pp. 1459-1469 (1990)) (0.42 g, 1.23 mmol) and 10% palladium on carbon (0.22g) in methanol (6 mL) was stirred at 1 atm hydrogen pressure for 3h. The mixture was filtered through Celite and evaporated The residue was dissolved in CH 2 C1 2 (4 mL) and DMF (2 mL) and cooled to 0 C. 2-Benzyloxycarbonylamino-propionic acid (0.30 g, 1.35 mmol), EDC (0.30, 1.54 mmol), DIEA (0.65 mL) and HOBt (0.17 g, 1.23 mmol) was added and the reaction was stirred 0.5h at 0OC, then 16h at room temperature under nitrogen. The solvent was removed in vacuo and the residue was dissolved in ethyl acetate, then was washed with 10% sodium bisulfate, saturated sodium bicarbonate, water and brine, was dried over sodium sulfate and was evaporated. Purification by flash chromatography on silica, eluted with 25:75 ethyl acetate: hexanes provided 1-(2-benzyloxycarbonylaminopropionyl)-4,4-difluoro-pyrrolidine-2-carboxylic acid tert-butyl ester (0.39 g, 77% yield) as a colorless oil.

H-NMR (500 MHz, CDC13) 6 1.3-1.6 12H), 2.5 (m, 0.8H), 2.7 1.2H), 3.9 1H), 4.1 1H), 4.4 (m, 1H), 4.7 1H), 5.1 2H), 5.59 (br d, J=7.7Hz, 0.8H), 5.7 (br d, J=7.7Hz, 0.2H), 7.35 5H) ppm.

Analytical HPLC (cyano column) 17.069 min. LC-MS m/e=413 357 (M+H-tert-butyl), 313 IM+H-(CO 2 tertbutyl)].

214 1- [2-(4-Amino-3-chloro-benzoylamuino)-propionyl]-4,4difluoro-pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-amide (116a).

Prepared from 115a and syn-40 to afford the title compound as an off-white solid (0.149, 73% yield). H- NMR (500 MHz, CD 3 0D) 6 1.0-1.5 3H), 2.0-3.5 (m, 4H+CH 3 0H), 3.5-5.5(M, 62+H20), 5.6-5.8 1H), 6.7-6.8 12), 7.1-7.8 8H), 8.2-8.6 IH) ppm.

Analytical HPLC (cyano column) 13.744 min. LC-MS (ES+) m/e=565

F

0 C1 H 116b 1-[2-(4-Acetylamino-3-chloro-benzoylamino) -propionyll 4,4-difluoro-pyrrolidine-2-carboxylic acid (2benzyloxy-5-oxo-tetrahydro-furan-3-yl)-smide (116b).

Prepared from 115b and syn-40 to afford the title compound as an off-white solid (0.08 g, 38% yield).

1 H-NMR (500 MHz, CDC1 3 8 1.03 J=6.9Hz, 0.4H), 1.30 J=6.9Hz, 0.63), 2.25 Id, J=2.9Hz, 3H), 2.4-3.2 (m, 4H),'3.6-4.4 43), 4.6-4.9 (m 3H), 5.52 J=5.2Hz, 0.62), 5.78 J=5.2Hz, 0.4H), 6.6 (br s, 12), 6.9-7.9 8H), 8.39 J=8.1 Hz, 0.4H), 8.44 J= 8.3Hz, 0.62), 8.74 J=6.8Hz;' 1) ppm. Analytical HPLC (cyano column) 11.830 min. LC-MS m/e= 607 (M+H) 215 1- 12- (4-Acetylamino-5-chlro-2-methoxy-bzoYlaio) propionyl]-4,4-difluoro-pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-fUran-3-y)-amide (116c).

Prepared from 115c and syn-40 to afford the title compound as an off-white (0.07g, 29% yield). 1 1-NMR (500 MHz, CDC1 3 1 6 0.99 J=6.SHz, 1.35H), 1.32 (d, J=6.9Hz, 1.65H), 2.25 1.5H), 2.26 1.SH), 2.3- 3.2 4H), 3.95 0.55H), 3.98 Cs, 0.45H), 3.7-4.1 2.51), 4.2-4.5 1.5H), 4.6-4.9 3H), 5.52 (Id, J=5.31z, 0.55H), 5.80 J=S.3Hz, 0.45), 7.0-7.4 (m, 4H), 7.7-7.9 2H), 8.0-8.4 2H), 8.49 (d, J=6.SHz, 1H), 8.93 J=6.7z, IH) ppm. Analytical HPLC (cyano column) 12.959 min. LC-MS CES+) mle=637 1- 4-Acetylain-3-chloro-benzoylio) -propionyl] 4,4-difluoro-pyrrolidine-2-carboxylic acid oxo-tetrahydro-furan-3-yl)-aide (116d).

Prepared from 115b and syn- turan-3-yl)-carbalic acid ally, ester to afford the 2 5 title compound as a 92:8 mixture of epimers. Oft-white solid (0.279, 66% yield). IH-TR (500 MHz, CDCl 3 8 i.- 216 6H), 2.25 1.8H), 2.26 1.2H), 2.3-3.1 4H), 3.3-4.3 4H), 4.5-4.9 3H), 5.45 (d, J=5.3Hz, 0.75H), 5.59 J=5.2Hz, 0.25H), 6.7-7.1 (m, 2H), 7.62 (dd, J=8.7, 2.0Hz, 1H), 7.76 1H), 7.85 J=2.0Hz, 1H), 8.48 1H) ppm. Analytical HPLC (C1 column) 13.300(91.8%), 14.046 min. LC-MS m/e 545

R

00

NN

H 0 N F 3 Ce 116e H 1- 2- (4-Acetylamino-3-chloro-benzoylamino) -propionyl]- 4,4-difluoro-pyrrolidine-2-carboxylic acid (2cyclohexyloxy-5-oxo-tetrahydro-furan-3-yl)-amide (116e).

Prepared from 115b and tetrahydro-furan-3-yl)-carbamic acid ally, ester to afford the title compound as a 93:7 mixture of epimers.

H-NMR (500 MHz, CDC1 3 8 1.0-2.0 13H), 2.25 (s, 2H), 2.26 1H), 2.40 (dd, J=17.3, 10.1Hz, 13), 2.84 (dd, J=17.3, 8.5Hz, 1H), 2.5-3.0 2H) 3.5-4.3 (m.

3.53), 4.5-4.9 2.53), 5.59 J=5.3Hz, 0.752), 5.76 J=S.2Hz, 0.25 6.74 Cbr d, J= 5.7Hz, 0.25H), 6.93 (br d, J=7.1Hz, 1H), 7.06 (br d, J=7.8Hz, 0.75H), 7.62 (dd, J=8.6, 2.0Hz, 1H), 7.78 1H), 7.85 J=2.0Hz, 1H), 8.35 (br d, J=6.6Hz, 0.25H), 8.50 (br d. J=8.2Hz, 0.75H) ppm. Analytical HPLC (C8 column) 17.112 17.433 min. LC-MS m/e=599

(M+H)

217

F

0 N N F H 0I O dN O H N C 116f

H

1-[2-(4-Acetylamino-3-chloro-benzoylaio) -propionyll- 4,4-difluoro-pyrrolidine-2-carboylic acid [2-(indanol- 2-yl)oxy-5-oxo-tetrahydro-furan-3-yl]-aide (116f).

Prepared from 115b and [2-(indanol-2-yl]oxy-5-oxotetrahydro-furan-3-yl)-carbamic acid allyl ester to afford the title compound as a 62:38 mixture of epimers. Off-white solid (0.34g, 71% yield). 1

H-NMR

(500 MHz, CDC1 3 6 1.09 J=6.9Hz, 0.6H), 1.21 (d, 3=6.9Hz, 0.9H), 1.33 J=6.9Hz, 0.9H), 1.42 (d, J=6.9Hz, 0.6H), 2.28 2H), 2.29 1H), 2.40 (dd, J=17.4, 10.3Hz, 1H), 2.4-3.3 7H), 3.6-4.2 2H), 4.5-4.8 4H), 5.66 0.6H), 5.84 3=4.3Hz, 0.2H), 6.22 0.2H), 6.7-7.0 2H), 7.2-7.3 (m, 4H), 7.5-7.7 13), 7.8-8.0 2H), 8.52 0.6H), 8.62 (br d, J=6.5Hz, 0.4H) ppm. Analytical HPLC (C18 column) 16.556 16.824 min. LC-MS m/e=633 O N ,N F 0

ANN

Cl -1 116g O N 1-[2-(4-Acetylamino-3-chloro-benzoylmino)-propionyl]- 4,4-difluoro-pyrrolidine-2-carboxylic acid (2- 218 cyclopentylmethozy-5-oxo-tetrahydro-furan-3-yl)-anide (116g).

Prepared from 115b and tetrahydro-furan-3-yl)-carbamic acid ally, ester to afford the title compound as an off-white solid (0.20g, 44% yield). 1H-NMR (500 MHz, CDC1 3 6 1.0-1.8 11H), 1.9-3.0 5H), 2.26 3H), 3.29 0.25H), 3.47 0.75H), 3.58 0.25H), 3.74 0.75H), 3.8 (m, 0.75H), 4.1 0.25H), 4.25 Cm, 1H), 4.4-4.8 3H), 5.44 J=5.2Hz, 0.75H), 5.62 J=5.2Hz, 0.25H), 6.7 (br, 0.25), 6.91 J=7.1Hz, 7.1 0.75K), 7.59 J=8.5Hz, 0.25H), 7.63 (dd, J=8.5, 0.75H), 7.75 1H), 7.86 J=1.8Hz, 1H), 8.33 (br d, J=6.5Hz, 0.25H), 8.49 (br d, J=8.4Hz, 0.75H) ppm.

Analytical HPLC C18 column) 17.705 min. LC-MS (ES+) m/e=599

F

0 N N

F

H 0 CI 116h H 1-[2-(4-Acetylamino-3-chloro-benzoylamjnino)-propionyl] 4,4-difluoro-pyrrolidine-2-carboxylic acid (2phenylethoxy-5-oxo-tetrahydro-furan-3-yl)-aide (116h).

Was prepared from 115b and syn-(5-oxo-2-phenethyloxytetrahydro-furan-3-yl)-carbamic acid allyl ester to afford the title compound as an off-white solid (0.1Sg, 24% yield). 1 H-NMR (500MHz, CDC1 3 6 1.29 J=6.9Hz, 0.75H), 1.40 J=6.9Hz, 2.25H), 2.25 2.25H), 2.26 is, 0.75H), 2.3-3.0 6H), 3.7-4.8 (mn, 7H), 5.38 (d, J=5.3Hz, 0.75H), 5.67 J=5.1Hz, 0.25K), 6.65 (m, 219 1H), 6.90 J=7.0Hz, 0.75H), 7.06 J=7.6Hz, 0.25H), 7.1-7.3 SH), 7.57 J=8.6Hz, 0.25H), 7.63 J=8.6Hz, 0.75H), 7.75 1H), 7.86 J=1.8Hz, 1W), 8.35 J=6.2 Hz, 0.25H), 8.49 J=8.3Hz, 0.75H) ppm. Analytical HPLC (C18 column) 17.265 min.

LC-MS m/e=621 Scheme XXII or7 AUOC..

C0 2

H

117 40 118 PkJ oH 119 N 00 H 0 H O £4Hs 121 120a= anti 120b= syn 2- (2-Benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbamoyl)pyrrolidine-1-carboxylic acid tert-butyl ester (118).

Prepared from 40 (1.16 g, 4.0 mmol) and Boc-Pro-OH according to the procedure used to prepare 100 (Scheme XVIII) to afford 1.53 g (94% yield) of the title compound as a white solid. 1 H-NMR (500 MHz, CDC1 3 6 1.61 (br, 9H), 1.88 (br, 2H), 2.00-2.50 3H), 2.80- 3.10 3.20-3.60 2H), 4.05-4.45 4.58-4.80 1.5H), 4.83-4.98 5.43-5.53 (m, 7.26-7.45 5H), 7.60-7.80 Analytical HPLC: 11.32 min; LC-MS: m/e 405 (M+H t I

I

220 2-Phnylaminopropianic acid (119).

A mixture of alanine (356 mg. 4.0 mmol), iodobenzene (816 mg, 4.0 mmol), trans-dichlorobis(cri-otolylphosphine) palladium (II) {PdlP(o-Tol) 3 1 2 C1 2 (160 mg, 0-2 mmol), copper iodide (40 mg, 0.2 mmol), K2CO 3 (552 mg. 4.0 mmol), benzyltriethylammonium chloride (160 mg, 0.8 mmol), triethylamine (1.6 mL) and water (0.8 mL) in DMF (8 ml) was stirred under nitrogen atmosphere at loo00C for 20 hours. The mixture was cooled to room temperature. diluted with ethyl acetate mL) and water (50 mL), acidified with 6W HCl to the pH 2 to 3. The aqueous layer was extracted with ethyl acetate (50 mL x The combined organic layers were washed with water, brine, dried over anhydrous Na 2

SO

4 tiltered and evaporated in Vacuo to give a red oil. Flash chromatography using hexane/erhyl acetate/acetic acid (95/5/0.5 to 80/20/0.5) to afford 300 mg (45% yield) of the title compound as a pink solid. 'H-NMR (500 MZz, CI)C1 3

/CD

3 0D 0.5 ml/3 drops) 6 1.45 3H), 4.02-4.15 6.57-6.70 3H).

7.11-7.25 2H); Analytical HPLC: 6-10 min. LC-MS: m/e 166 (M*tR), 1-(2-Phanylamiao-propianyl)-pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oo-tetrabydro-furan-3-yl)-amide (120a and 120D).

A solution of 11a (405 mg, 1.0 mmol) was treated with TFA [2 mL) in CH 2 C1 2 (2 nmL) for one hour. The reaction solution was evaporated in vacuo and azeotroped with CH2C12 four times to give pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3-yl) -amide as a pale yellow solid. 1 H-NMR (500 MHz, CDC1 3 8 1.87-2.15 4H), 2.30-2.70 2.80-3.08 3.45 (br, 221 2H), 4.35-4.98 3H), 5.30-5.56 7.10-7.60 (m, Analytical HPLC: 7.78 8.20 min.; LC-MS: m/e 305 (M+H t 2-Phenylaminopropionic acid (119) (300 mg, 1.8 mmol) in

CH

2 C2 (10 mL) was treated with HOBT (270 mg, 2.0 mmol) and EDC (2.1 g, 11 mmol) at 0°C for 10 min.

Diisopropylethylamine (2 mL) was added followed by a solution of pyrrolidine-2-carboxylic acid (2-benzyloxy- 5-oxo-tetrahydro-furan-3-yl)-amide in CH 2

CI

2 (10 mL).

The mixture was stirred at room temperature for 4 hours, diluted with CH 2 C12 (40 mL), washed with water then brine. The organic layer was dried over anhydrous Na 2

SO

4 filtered and evaporated in vacuo to give a pale yellow solid. Flash chromatography using CH 2

CI

2 /methanol (99/1 to 98/2) afforded 151 mg (33% yield) of anti diastereomer of the title compound (120a) and 129 mg (29% yield) of syn diastereomer (120b) as a white solid. 1H-NMR (500 MHz, CDC13) for the anti diastereomer: 6 1.37-1.41 3H), 1.50-2.45 4H), 2.60-2.70 0.3H), 2.89-2.94 0.7H), 3.40-3.80 (m, 2H), 4.10-4.50 3H), 4.50-4.90 3H), 5.26 (s, 0.3H), 5.38 0.7H), 6.45-6.60 2.3H), 6.65-6.80 7.10-7.20 2.5H), 7.25-7.50 4.5H), 7.53- 7.70 0.7H), 7.82 For the syn diastereomer: 0.86-0.89 1.20-1.40 4H), 1.80-2.45 (m, 4H), 2.80-2.86 3.58-3.65 2H), -4.20-4.40 (m, 4.50-4.75 2H), 4.90 5.52 6.45- 6.70 3H), 6.75-6.85 7.10-7.20 2.3H), 7.30-7.50 5.7H);.Analytical HPLC: 10.55 min for anti diastereomer and 10.62 min for syn diastereomer; LC/MS: m/e 452 for both diastereomers.

222 4-Oxo-3-{ (2-phenylamino-propionyl)-pyrrolidine-2carbonyl]-amino}-butyric acid (121).

Prepared from 120 (151 mg, 0.33 mmol) using hydrolysis method A to afford 101 mg (83% yield) of the title compound as a white solid. IH-NMR (500 MHz, CDC13/CD30D 6 1.20-1.65 2H), 1.65-2.35 3H), 2.40- 3.00 3.20-3.80 2H), 3.90-4.90 7H), 7.25-7.80 5H); Analytical HPLC: 6.38 min.; LC-MS: m/e 362 GENERAL PROCEDURES FOR THE PREPARATION OF COMPOUNDS OF EMBODIMENT C FORMULA I (SCHEMES XXIII-XXV) Scheme XXIII RH

OH

R

H

H

O

Hydrolysis Method A: A 0.005-50 mmole sample of the alkylhemiacetal was dissolved in 2.5 N HC1/ CH 3 CN (10/ 1) and stirred at room temperature until the reaction was complete. The resulting aqueous layer was washed with diethyl ether (2 x 20 mL) and lyophilized to afford the product.

Hydrolysis Method B: 223 A 0.005-50 mmole sample of alkylhemiacetal was taken into neat formic acid and stirred overnight at room temperature. The mixture was triturated with a 3:1 mixture of hexane/diethyl ether to give a precipitate.

The solvent was decanted and the precipitate washed with diethyl ether to afford the product.

Hydrolysis Method C: A 0.005-50 mmole sample of the alkylhemiacetal was dissolved in CH 3 OH and 20% Pd(OH) 2 /C and stirred under

H

2 until the reaction was complete. The resulting suspension was filtered and the solution concentrated in vacuzo, then triturated with a 3:1 mixture of hexane/diethyl ether to give a precipitate. The solvent was decanted and the precipitate washed with diethyl ether to afford the product.

Hydrolysis Method D: A 0.005-50 mmole sample of the alkylhemiacetal in

CH

3 CN/ water 2) was shaken with acidic resin (Dowex x 2, H type) until the reaction was complete. The solution was filtered and the resin washed with

CH

3 CN/water The resulting water layer was washed with diethyl ether, concentrated to a smaller volume in vacuo then lyophilized to afford the product.

Scheme XXIV RN-1--N>7 r 4

H

3 0 RNJ<2 2

O-RB

76 98 224 122a 4-Oxo-3- [9-oxo-9H-fluorene-4-carbonyl) -amino] propionyl}-pyrrolidine-2 -carbonyl) -amino] -butyric acid (122a).

A 109.0mg (0.19mmol) sample of 91 was hydrolyzed according to method A to afford 88mg (96% yield) of the title compound: Analytical HPLC 7.15min. LC-MS (ES+) m/e=492.2 CAH Cl H 0 122b 3- (4-Amino-3-chloro-benzoylamino) -propionyl] pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (122b).

A 51.0mg (0.096mmole) sample of 76 was hydrolyzed according to method A to afford 43.0mg (100% yield) of the title compound: H-NMR (500 MHz, CD30D/D 2 0: drops): 8 1.37-1.52 3H), 1.80-2.20 3H) 2.20-2.37 2.49-2.60 2.60-2.75 H), 3.70-3.80 3.80-3.95 4.20-4.35 H), 4.40-4.50 4.50-4.70 4.70-4.85 H), 6.85-6.87 7.58-7.60 7.77 H); retention time on analytical HPLC: 6.54 min; LC-MS: m/z 439 225 C

W

y N

OH

H 0

H

CI H 0 122c 3- (3,5-Dichloro-4-methoxy-benzoylaino) propionyl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (122c).

A 51.0mg (0.088mmole) sample of 92 was hydrolyzed according to method A to afford 24.0mg (56% yield) of the title compound: Analytical HPLC 6.41min. LC-MS (ES m/e=488.3 0 0 NH H 122d 3- (4-Methoxy-3,5-dimethyl-benzoylamino) propionyl] -pyrrolidine-2-carbonyl -amino) -4-oxo-butyric acid (122d).

A 55.0mg (0.102mmole) sample of 77 was hydrolyzed according to method A to afford 44.0mg (96% yield) of the title compound: Analytical HPLC (C18) 8.70min, 1

H-

NMR (CDC1 3 500Mhz): 8 1.23-1.70 3H), 1.80-2.70 (m, 10H), 2.70-3.15 2H), 3.58-4.20 5H), 4.32-5.50 3H), 5.60-6.00 6.80-7.90 4H); LC-MS m/e=448.2 226 122e 4-Oxo-3- [pyridine-2-carbonyl) amino] -propionyl)pyrrolidine-2-carbonyl)-amino]-butyric acid (122e).

A 55.0mg (0.114mmole) sample of 88 was hydrolyzed according to method A to afford 30.0mg (67% yield) of the title compound: Analytical HPLC 4.60min. LC-MS (ES m/e=391.3 0O H H Cl H 0 122f 4 -Acetylamino-3-chloro-benzoylamino)propionyl] -pyrrolidine-2-carbonyl-amino) -4-oxo-butyric acid (122f).

A 52mg (0.091mmole) sample of 78 was hydrolyzed according to method A to afford 40mg (91% yield) of the title compound: 1H NMR (500MHz, CD 3 0D) 6 1.08-1.61 (m, 3H), 1.77-2.41 3H), 2.21 3H), 2.41-2.77 (m, 2H), 3.43-3.63 0.3H), 3.65-3.76 1H), 3.81-3.94 1H), 4.18-4.34 1H), 4.42-4.64 1.7H), 4.77 1H), 7.79 (dd, 1H); Analytical 1PLC 4.97min. LC- MS m/e=481.3 I 227 122g 2-( 4 propionyl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (122g).

A 44.3mg (0.079mmole) sample of 89 was hydrolyzed according to method A to afford 30mg (B1% yield) of the title compound: Analytical HPLC 5.40min. LC-MS (ES*) m/e=473.2 y

H

O

122h 3- 3 -Isopropoxy-benzoylamino) -propionyl] pyrrolidine-2-carbonyl}-amino) 4 -oxo-butyric acid (122h).

A 52.0mg (0.097mmole) sample of 79 was hydrolyzed according to method A to afford 30.0mg (69% yield) of the title compound: Analytical HPLC 8.92min.

LC-MS

m/e=448.3 228 122i 3- (3-benzyloxy-4-methoxy-benzoylamino) propionyl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (122i).

A 50.8mg (0.082mmole) sample of 81 was hydrolyzed according to method A to afford 22.4mg (52% yield) of the title compound; Analytical HPLC 6.72min. LC-MS m/e=526.3 0 H H 122j 4-Oxo-3- [(quinoxaline-2-carbonyl) -amino] propionyl}-pyrrolidine-2-carbonyl)-amino] -butyric acid (122j).

A 38.0mg (0.072mmole) sample of 80 was hydrolyzed according to method A to afford 32.0mg (100% yield) of the title compound: Analytical HPLC 5.95min. LC-MS (ES m/e=442.3 122k 229 (3,5-Dichloro-4-hydroxy-benzoylamino) propionyl] -pyrrolidine-2-carbonyl -amiLno) -4-oxo-butyric acid (122k).

A 35mg (0.060mmole) sample of 83 was hydrolyzed according to method A to afford 29.4mg (75% yield) of the title compound: Analytical HPLC 7.91min. 'H-NMR (500 MHz, CD30D) 6 1.47 3H). 1.8-2.3 4H), 2.49 1H), 2.61 1H), 3.5 (br m, 0.2H), 3.69 (br m, 0.9H), 3.84 (br m, 0.9H), 4.27 1H), 4.46 1H), 4.57 1H), 4.73 IH), 7.83 2H) ppm, LC-MS m/e=474.1 2N 0 N J H F F 0 1221 3- (4-Amino-3-trifluoromethyl-benzoylamino) propionyl] -pyrrolidine-2-carbonyl-azino) -4-oxo-butyric acid (1221).

A 10mg (0.021mmole) sample of 98w was hydrolyzed according to method A to afford 7.9mg (94% yield) of the title compound: Analytical HPLC 6.64min. LC-MS

(ES

4 m/e=473.3 122m 230 3- (3-Chloro-4-dimethyiamino-benzoylamino) propionyl) -pyrrolidine-2-carbonyl)-amino) -4-oxo-butyric acid (122m).

A 10.0mg (0.O2lmmole) sample of S8x was hydrolyzed Saccording to method A to afford 7.0mg (84% yield) of the title compound: Analytical HPLC 5.15min. LC-MS

(ES

4 mn/e=467.3 0 F Ny 0 H F H 0 I122n 3- (4-Dimethylamino-3,5-difluoro-benzoylaino)propionyl] -pyrrolidine-2-carbnyl-Aznino) -4-oxo-butyric acid (122n).

A 20.0mg (O.O4Jmmoie) sample of 98y was hydrolyzed according to method A to afford 16.8mg (100t yield) of the title compound: Analytical SPIJC 5.86min. LC-MS

(ES

4 m/e=469.3 (M+H)

H

2 N H0 k 122o 3- (4-Amino-3-chloro-benzoylaaino) -propionyll pyrrolidine-2-carbanyl) -amino) -4-oxo-butyric acid (122o).

A 20.0mg (O.O4Gmmole) sample of 98m was hydrolyzed according to method A to afford 16.7mg (100% yield) of 231 the title compound: Analytical HPLC 8.47min. LC-MS m/e=439.2 F 0 F N NOH o

H

2 N F O N H F H 122p 3- (4-Amino-2,3,5,6-tetrafluoro-benzoylamino) propionyl] -pyrrolidine-2 -carbonyl -amino) -4-oxo-butyric acid (122p).

A 20.0mg (0.042mmole) sample of 98z was hydrolyzed according to method A to afford 15.3mg (91% yield) of the title compound: Analytical HPLC 7.90min. LC-MS m/e=477.2 H 0 122q 4-Oxo-3- [(quinoline-6-carbonyl) -aino] propionyl}-pyrrolidine-2-carbonyl) -amino] -butyric acid (122q).

A 44mg (0.080mmole) sample of 93 was hydrolyzed according to method A to afford 41mg (100% yield) of the title compound: 1H NMR (500MHz, CD 3 0D) 5 1.24-1.69 3H), 1.75-2.37 4H), 2.39-2.87 2H), 3.46- 4.04 2H), 4.11-4.77 3H), 8.19 (dd, 1H), 8.33 1H1), 8.56-8.58 1H), 8.85 1H), 9.27-9.39 (m, 232 2H); Analytical HPLC 4.91min. LC-MS m/e=441.2 N

OH

C 0 122r 3- (4-Acetylamino-5-chloro-2-methoxybenzoylamino) -propionyl] -pyrrolidine-2-carbonyl}amino)-4-oxo-butyric acid (122r).

A 44.5mg (0.074mmole) sample of 87 was hydrolyzed according to method A to afford 34.5mg (91% yield) of the title compound: Analytical HPLC 6.88min. LC-MS (ES m/e=511.2 H CI0

I

122s [3-Chloro-4-(2,2-dimethyl-propionylamino)benzoylamino] -propionyl} -pyrrolidine-2-carbonyl) amino]-4-oxo-butyric acid (122s).

A 19.0mg (0.036mmole) sample of 98aa was hydrolyzed according to method A to afford 14.5mg (90% yield) of the title compound: Analytical HPLC 7.28min. LC-MS m/e=523.3 233 122t 3- (3-Chloro-4-propionylamino-benzoylamino)propionyl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (122t).

A 21.0mg (0.042mmole) sample of 98ab was hydrolyzed according to method A to afford 17.5mg (97% yield) of the title compound: Analytical HPLC 5.72min. LC-MS m/e=495.2 0I H 0

OO

122u 3- (3-Chloro-4-phenylacetylamino-benzoylamino) propionyl] -pyrrolidine-2-carbonyl}-amino) -4-oxo-butyric acid (122u).

A 10.0mg (0.017mmole) sample of 98ac was hydrolyzed according to method A to afford 7.9mg (85% yield) of the title compound: Analytical HPLC 7.52min. LC-MS m/e=557.2 122v 234 3-[(1-(2-[3-Chloro-4-(3-methyl-butyrylamino)benzoylamino] -propionyl) -pyrrolidine-2 carbonyl) amino] -4-oxo-butyric acid (122v).

An 8.0mg (0.015mmole) sample of 9Bad was hydrolyzed according to method A to afford 6.5mg (96% yield) of the title compound: Analytical HPLC 6.92min. LC-MS

(ES

4 m/e=523.2 Scheme XXV Z 0 Z 0

Q

z oZ N. N N H I HI 108a, X=CI, Y=NH 2 Z=H, 0=F, 02H 123a, x=C, Y=NH2, Z=H, Q2=H 116b, X=CI. Y=AcNH, Z=H, QI=Q=F 123b, X=CI Y=AcNH, Z=H, Qi=Q=F 116c, X=CI, Y=AcNH, Z=CH30, 1=Q 2 =F 123c, X=CI, Y=AcNH, Z=CH30, Q1 =Q=F 3- (4-Axnino-3-chloro-benzoylaino) -propionyll -4fluoro-pyrrolidine-2-carbony}-amo) -4-oxo-butyric acid (123a).

A 12.4mg (0.O22nmole) sample of 108b was hydrolyzed according to method A to afford 9.6mg (93k yield) of the title compound: Analytical HPC 6.99min. LC-MS

(ES

4 m/er473.2 3-((-[2-(4-Acetylamino-3-chloro-benzoy1a±no)propionyl] 4 ,4-difluoro-pyrrolidine-2.carbony1>.amno) 4-oxo-butyric acid (123b).

A 26.2mg (0.O43mmole) sample of 116b was hydrolyzed according to method A to afford 10.8mg (49% yield) of the title compound: Analytical HPLC 9.89min. LC-MS m/e=517.2 235 3- (4-Acotylamin-3-chloro-2-methaxybenoylamino)-propionyll-4,4-difluoro-pyrrolidino-2carbonyl}-amino)-4-oxo-butyric acid (123c).

A 23.1mg (0.036mmole) sample of 116c was hydrolyzed according to method A to afford 1.8mg yield) of the title compound: Analytical HPLC 11.87min. LC-MS (ES*) m/e=547.1 BIOLOGICAL METHODS We obtained in vitro, ex vivo, and in vivo data for selected compounds of this invention using the methods described below. The results are shown in the Tables 2-8. The designation "ND" indicates that the compound was not tested in the described assay.

In the ICE Caspase assays, category "A" indicates dlO nM inhibition. Category indicates 10-1000 nM inhibition. Category indicates >1000 nM inhibition. See Tables 2 and 3.

In the PBMC assay, category indicates <500 nM inhibition. Category indicates SOO-1000 nM inhibition. Category indicates 1001-2000 nM inhibition. Category indicates >2000 nM inhibition. See Table 4.

In the whole blood assay, category "A" indicates <2500 nM inhibition, category indicates 2500-7500 nM inhibition. Category indicates >7500 nM- See Table In the in situ metabolism assay, values of X are disclosed as follows: category "A" indicates cO.25. category indicates 0.25-0.49.

Category indicates 0.5-0.75. Category "D" indicates >0.75. In the biliary excretion measurement, 236 category indicates Category indicates Category indicates See Table 6.

In the i.v. clearance assay, values are reported as follows: category indicates Category indicates 50-80. Category indicates See Table 7.

In the bioavailability assay, the Cmax values (g/ml) are disclosed as follows: category "A" indicates Category indicates 2.5-5.0.

Category indicates The AUC values (gg x hr/ml) are disclosed as follows: category "A" indicates Category indicates 2.5-5.0.

Category indicates Half-life (hrs) ranges are disclosed as follows: category indicates Category indicates 1.5-2.0. Category indicates The F values are disclosed as follows: category indicates <33. Category indicates 33- 67. Category indicates >67. See Table 8.

In Vitro Assays Enzyme Inhibition Ki values for test compounds with the various caspases were obtained by the method of Margolin et al.

Biol. Chem., 272 pp. 7223-7228 (1997)). Assays were performed in 10 mM Tris (Sigma Corp, St Louis MO) pH 7.5, 1 mM Dithiothreitol (DTT, Research Organic INC, Cleveland, OH) and 0.1% CHAPS (Pierce, Rockford IL) at 37 For caspase-3, a solution of 8% glycerol was added to the assay buffer to improve enzyme stability.

A 65 AL aliquot of the assay buffer and 5 AL aliquot of the appropriate dilutions of inhibitor in DMSO where pipetted into a 96 well plate, treated with 10 AL of caspase, then diluted in assay buffer (0.5-40 nM active protein by active site titration). A control 237 containing DMSO but no compound was included for each determination. The plates were then incubated for minutes at 37 OC, before addition of the appropriate substrate (20 AL, final concentration 1-4 .X KM, final assay volume 100 AL) to initiate the reaction.

Reaction rates were measured at 37°C either by following the time dependant increase in absorbance at 405 nM (for the pNA substrates) or in fluorescence (Ex 390, Em 460) (for the AMC substrates). The rates obtained were plotted against inhibitor concentration and the data fit to the Morrison tight-binding equation for competitive inhibitors (Morrison, Biochem.

Biophys. Acta, 185 pp. 269-286 (1969)). The substrates used for the individual assays were as follows: Caspase-1 Suc-YVAD-pNA (Bachem, King of Prussia, PA) (final concentration in the assay 80 tM), Caspase-3 Ac-DEVD-pNA (Bachem, King of Prussia, PA) (final concentration in assay, 60 pM) Caspase-4 Ac-WEHD-AMC (Synpep, Dublin, CA) (final concentration in Assay 20 pM), Caspase-7 Ac-DEVD-AMC (Bachem, King of Prussia, PA) (final concentration in assay 50 pM), Caspase-8 Ac-DEVD-pNA (Bachem, King of Prussia, PA) (final concentration in assay 80 pM).

Table 2. Caspase-1 Inhibition Data Example Caspase-1 Ki (nM)

A

A

A

A

B

B

238 Example Caspase-l Ki (nM) Sg

B

A

Si

A

A

A

Si

B

Sm

A

A

So

B

SpB SqB Sr

B

Ss

B

C

B

B

B-

Sx

A

A

A

Saa

A

B

Sac

A

Sad

A

Sae

B

Sat

B

sag

A

Bah

B

Sai

A

Saj

B

Sak

B

239 Example Caspase-1 Ki (riM) Sal A Sam A San B Sac B Sap B Saq B Sar A Sas A Sat B Sau B Say B Saw A Sax A Say A Saz A Sba A

A

Sbc B Sbd A 7a A 7b B 7c A 7d A 7e B 7f B 7g A 7hB 7i B 7jC 7k2 71B 240 -Example Caspase-1 Ki (nM)- 7mn B 7n B 7c A 7p A 7q B 7r

BI

7s B 7t B 7un B 7v B ?w A 7x B 7y B 7z B 7aa A 7ab B 7ac B iad B "7ae B 7af B 7ag B 7ah A 7ai A 7aj A 7aM A 7a1 B 7am A 7an A 7ao B 7 apB 7aqB 241 i Example Caspase-1 Ki (niM)- Y7ar A '7as A 7at A 9a B 9b A 9c A 9d A 9e A 9fA Sgq

B

ise B

B

16a B 16b A 17a B 17b B 17 c A 17d 17eB 18a B 18b A 18c B 18dB i~e A 18f

A

242 Example Caspase-1 Ki (nM)_

A

B

A

A

A

A

B

B

A

201 A

A

A

200 A

A

B

B

A

B

23a A 23bB 23c A 23d A 23e A 23f B 23g A 23h A 23 i B 24a A 24b C 24c A 24d B 243 Example Caspase-l Ri (riM) 24e B

A

A

A

A

A

26a A 26b A 26c A 26d A 26e A 26f A 26g A 26h A 27a B L 27b

B

27cB 27d A 27e B 27f B 27g A 27hB 27i B 27jB 27k B 271 B 27mB 27nB 28a A t 28b A 28c {A

I

244 Example Caspase-a Ki (nM) 29a A 29b A 29c A 29d A 29e A 29f

A

29g A 29h

A

29i

A

29j A 29k

A

291

B

29m A 29n B 29o

B

29p

A

29q A 29r

A

29s B 32a c 32b c 32C

C

32d

C

32e B 34

C

G3.

C

G2B 42B 46b

A

.46a

C

57 A 245 Example Caspase- 1 Ki (riM)

-A

61 A 69

A

'73

A

121

C

122a A 122b

A

122c

A

122d

-A

122e B 122f

A

1229 A 122h

B

122i

A

122j B 3.22k

A

1221

B

122m

B

122n B3 122o

C

1 22p A 122q B 122r IB 122s

B

122t B 122u A 122vB 123a 123b

B

123c

BI

246 Table 3. Caspase-3, Inhibition Caspase-4, and Caspase-8 Data Example Caspase-3 Ki Caspase-4 Ki Caspase-8 Ki (nM) (nM) (nM) 7c C ND C 7d C ND B 7f C ND C 24a C ND ND 29a C ND ND 29b C ND ND 32d B ND ND 46b B ND ND 69 C ND B 122b C A B 122d C A C 122f C ND B 122k C ND B PBMC Cell Assay IL-1p Assay with a Mixed Population of Human Peripheral Blood Mononuclear Cells (PBMC) or Enriched Adherent Mononuclear Cells Processing of pre-IL-lp by ICE can be measured in cell culture using a variety of cell sources. Human PBMC obtained from healthy donors provides a mixed population of lymphocyte subtypes and mononuclear cells that produce a spectrum of interleukins and cytokines in response to many classes of physiological stimulators. Adherent mononuclear cells from PBMC provides an enriched source of normal monocytes for selective studies of cytokine production by activated cells.

247 Experimental Procedure: An initial dilution series of test compound in DMSO or ethanol is prepared, with a subsequent dilution into RPMI-10% FBS media (containing 2 mM Lglutamine, 10 mM HEPES, 5C U and 50 pg/ml pen/strep) respectively to yield drugs at 4x the final test concentration containing c.4% DMSO or 0.4% ethanol.

The final concentration of. DMSO is 0.1t for all drug dilutions. A concentration titration which brackets the apparent K i for a test compound determined in an ICE inhibition assay is generally used for the primary compound screen.

Generally 5-6 compound dilutions are tested and the cellular component of the assay is performed in duplicate, with duplicate ELISA determinations on each cell culture supernatant.

PBMC Isolation and IL-1 Assay: Buffy coat cells isolated from one pint human blood (yielding 40-45 ml final volume plasma plus cells) are diluted with media to 80 ml and LeukoPREP separation tubes (Becton Dickinson) are each overlaid with 10 ml of cell suspension. After 15 min centrifugation at 1500-1is8 xg, the plasma/media layer is aspirated and then the mononuclear cell layer is collected with a Pasteur pipette and transferred to a ml conical centrifuge tube (Corning). Media is added to bring the volume to 15 ml, gently mix the cells by inversion and centrifuge at 300 xg for 15 min.

The PBMC pellet is resuspended in a small volume of media, the cells are counted and adjusted to 6 x 106 cells/m 248 For the cellular assay, 1.0 ml of the cell suspension is added to each well of a 24-well flat bottom tissue culture plate (Corning), 0.5 ml test compound dilution and 0.5 ml LPS solution (Sigma #L- 3012; 20 ng/ml solution prepared in complete RPMI media; final LPS concentration 5 ng/ml). The 0.5 ml additions of test compound and LPS are usually sufficient to mix the contents of the wells. Three control mixtures are run per experiment, with either LPS alone, solvent vehicle control, and/or additional media to adjust the final culture volume to 2.0 ml.

The cell cultures are incubated for 16-18 hr at 37 °C in the presence of 5% C0 2 At the end of the incubation period, cells are harvested and transferred to 15 ml conical centrifuge tubes. After centrifugation for 10 min at 200 xg, supernatants are harvested and transferred to ml Eppendorf tubes. It may be noted that the cell pellet may be utilized for a biochemical evaluation of pre-IL-lp and/or mature IL-lp content in cytosol extracts by Western blotting or ELISA with pre-IL-lp specific antisera.

Isolation of Adherent Mononuclear cells: PBMC are isolated and prepared as described above. Media (1.0 ml) is first-added to wells followed by 0.5 ml of the PBMC suspension. After a one hour incubation, plates are gently shaken and nonadherent cells aspirated from each well. Wells are then gently washed three times with 1.0 ml of media and final resuspended in 1.0 ml media. The enrichment for adherent cells generally yields 2.5-3.0 x 105 cells per well. The addition of test compounds, LPS, cell 249 incubation conditions and processing of supernatants proceeds as described above.

ELISA:

Quantikine kits (R&D Systems) may be used for the measurement of mature IL-10. Assays are performed according to the manufacturer's directions. Mature IL- 1p levels of about 1-3 ng/ml in both PBMC and adherent mononuclear cell positive controls are observed. ELISA assays are performed on 1:5, 1:10 and 1:20 dilutions of supernatants from LPS-positive controls to select the optimal dilution for supernatants in the test panel.

The inhibitory potency of the compounds can be represented by an IC 50 value, which is the concentration of inhibitor at which 50% of mature IL-lp is detected in the supernatant as compared to the positive controls.

The skilled practitioner realizes that values obtained in cell assays may depend on multiple factors.

The values may not necessarily represent fine quantitative results.

Table 4. PBMC Cell Assay Data Example PBMC IC50 (nM)

D

B

B

B

B

C

C

A

250 Example PBMC ICSO (nM) Si C Si D

D

51. A

A

Sr D

B

Su C By D Sw B Sx B SBy B

B

Baa B Sab B3 Sac A

A

Sag B Sai A Saj B

B

Sal D Sam D Sao D Sag D Sar D Sas D Sat D Bau D Say D 251 Example JPBMC ICSO (nM) Saw JC Sax B Say B Saz B Eba C Sbb B C1 '7a D 7b B 7c A ?d A ?e

D

7f D 7h 7kB 71 B 7m B 7n B 7o A 7p D 7q D ?s B itD 7u D 7v D 7w C 7x D 7 y D 7z c 9a B 252 Example PBMC ICSO (riM) 9b B 9c A 9d B 9e c 9f B 9g c

D

isb C

B

C

ise D

D

16a A 16b C 17b C 17c D 17d D 17e B 18a B 18b B lsc B lad B 18e C lef D

B

B

C

D

C

B

A

253 Example PBMC ICSO CnN)

A

B

D

A

201 B

A

A

B

2Cr B

C

B

23a C 23b B 23c C 23d B 23e B 23f c 23g C 23h c 23i A 24a B 24b D 24c A 24d B 24e C

A

B

B

26a c 254 Example PBMC IC50 (nM) 26bB 26CB 26d B 26e

A

26f

A

26g A 26h

A

27a A 28a B 28b

B

28c B 29a A 29b c 29c B 29d B 29e A 29g

B

29h

A

29i

A

29j

B

29kA 291

B

29m

B

42 D 46b

D

57B

B

61

B

69

A

73

B

122a

D

255 Example PBMC IC50 (nM) 122b B 122c D 122d B 122e C 122f B 122g B 122h C 122i C 122j D 122k A 1221 B Whole Blood Assay for IL-1i Production Whole blood assay IC 50 values for compounds of this invention were obtained using the method described below: Purpose: The whole blood assay is a simple method for measuring the production of IL-l1 (or other cytokines) and the activity of potential inhibitors. The complexity of this assay system, with its full complement of lymphoid and inflammatory cell types, spectrum of plasma proteins and red blood cells is an ideal in vitro representation of human in vivo physiologic conditions.

Materials: Pyrogen-free syringes 30 cc) Pyrogen-free sterile vacuum tubes containing lyophilized Na 2 EDTA (4.5 mg/10 ml tube) 256 Human whole blood sample (C 30-50 cc) ml Eppendorf tubes Test compound stock solutions 25mM in DMSO or other solvent) Endotoxin -free sodium chloride solution and

HBSS

Lipopolysaccharide (Sigma; Cat- L-3012) stock solution at 1mg/ml in HBSS IL-1 ELISA Kit CR D Systems; Cat TNFa ELISA Kit (R D Systems: Cat DTASD) Water bath or incubator Whole Blood Assay Experimental Procedure: Set incubator or water bath at 30 oC.

Aliquot 0.25ml of blood into 1.5 ml Eppendorf tubes.

Note: be sure to invert the whole blood sample tubes after every two aliquots. Differences in replicates may result if the cells sediment and are not uniformly suspended. Use of a positive displacement pipette will also minimize differences between replicate aliquots.

Prepare drug dilutions in sterile pyrogenfree saline by serial dilution. A dilution series which brackets the apparent K i for a test compound determined in an ICE inhibition assay is generally used for the primary compound screen. For extremely hydrophobic compounds, prepare compound dilutions in fresh plasma obtained from the same blood donor or in PBS-containing 5% DMSO to enhance solubility.

Add 25 l test compound dilution or vehicle control and gently mix the sample. Then add 5.0 il LPS solution (250 ng/ml stocket prepared fresh: 5-0 ng/ml final concentration LPS), a,nd mix again. Incubate the tubes at 30 QC in a water bath for 16-18 hr with occasional mixing. Alternatively, the tubes can be 257 placed in a rotator set at 4 rpm for the same incubation period. This assay should be set up.in duplicate or triplicate with the following controls: negative control no LPS; positive control no test inhibitor; vehicle control the highest concentration of DMSO or compound solvent used in the experiment.

Additional saline is added to all control tubes to normalize volumes for both control and experimental whole blood test samples.

After the incubation period, whole blood samples are centrifuged for 10 minutes at 2000 rpm in the microfuge, plasma is transferred to a fresh microfuge tube and centrifuged at 1000 x g to pellet residual platelets if necessary. Plasma samples may be stored frozen at -70 °C prior to assay for cytokine levels by ELISA.

ELISA:

R D Systems (614 McKinley Place N.E.

Minneapolis, MN 55413) Quantikine kits may be used for measurement of IL-1P and TNF-a. The assays are performed according to the manufacturer's directions.

IL-1P levels of 1-5 ng/ml in positive controls among a range of individuals may be observed. A 1:200 dilution of plasma for all samples is usually sufficient for experiments for ELISA results to fall on the linear range of the ELISA standard curves. It may be necessary to optimize standard dilutions if you observe differences in the whole blood assay. Nerad, J.L. et al., J. Leukocyte Biol., 52, pp. 687-692 (1992).

258 Table s. Whole Blood Assay Data 259 Example Whole Blood ICSO (nlA)

A

bb- B 7a B 7b A 7c A 7d B 7e c 7f B 7g B 7h A 7 k A 71 A '7m B 7ni A 7o A 7 p B 7q A 7s

B

7t B 7u B 7v A 7w A 7x c 7y c 7z A 7aa B 7ab A 7acB 7adB 7ahB '7a1 B 260 261 Example Whole Blood IC50 (nM)

A

201 A

A

A

A

A

C

B

A

A

23a B 23b B 23c B 23d A 23e B 23f A 23g A 23h A 23i B 24a B 24c B 24d B 24e B

B

B

B

A

C

26c B 26d A 262 Example 1Whole Blood IC50 CnN) 26e A 2Sf

B

26g B 26h

A

27a

A

27b

A

27d A 27e

A

27fB 27g

B

27h

B

27i

B

27.1 27mB 27nA 28a 28Sb 28c

C

29a___

A

29c A 29d A 29e A 29g A 29h

A

29i

A

29j

A

29k

A

291

A

29n

B

29o

A

29p

A

263 Example I Whole Blood IC50 (nM) 29g

A

29r

A

29s

A

G2B 42B 46bB 57

C

A

61

A

69

A

73

A

122a

A

12 2b

A

122c

B

122d

A

122e

B

122f

A

122g

A

122h

A

1221

A

122j

B

122k

A

1222

A

122m

B

12 2p

B

122q

B

122r

B

122st

B

123a

A

123b

B

264 Ex Vivo Assays Metabolism and Excretion Single pass perfusion studies in rat were performed to assess gastrointestinal (GI) wall metabolism liver metabolism and biliary excretion. The method used has been described in Pang, J. Pharmacol. Exp. Therapeutics, 333, pp. 788-798 (1984).

Table 6. Metabolism and Excretion Data Example f(g)Xf(h) Biliary Excretion A

C

B

A

B

C

7d D

A

7f C

A

7ac C

C

18f D

A

B

C

B

A

23b B

B

24a C

A

24c A

C

24e A

C

C

C

C

B

26c A

C

26e B

B

26f A

C

27a C

A

27b B

A

29b A

B

I

265 Example f(g)Xf Biliary Excretion 29g B B 29n C A 290 C A 29p B C 29q C A 29r C B 46b B C 57 B B B C 69 C A 122a B A 122b C A 122c C B 122d C A 122r B A In Vivo Assays Clearance Assay Clearance Rates In vivo Rat The rate of clearance in the rat (ml/min/kg) for compounds of this invention may be obtained using the method described below: Representative Procedure Cannulations of the jugular and carotid vessels of rats under anesthesia are performed one day prior to the pharmacokinetic study. M.J. Free, R.A.

Jaffee; 'Cannulation techniques for the collection blood and other bodily fluids'; in: Animal Models; p. 480-495; N.J. Alexander, Ed.; Academic Press; (1978). Drug (10mg/mL) is administered via the jugular vein in a vehicle usually consisting of: propylene glycol/saline, containing 100mM sodium bicarbonate in a 1:1 ratio. Animals are dosed with 10-20 mg drug/kg and r 266 blood samples are drawn at 0, 2, 5, 7, 10, 15, 20, and 90 minutes from an indwelling carotid catheter.

The blood is centrifuged to plasma and stored at -20 °C until analysis. Pharmacokinetic analysis of data is performed by non-linear regression using standard software such as RStrip (MicroMath Software, UT) and/or Pcnonlin (SCI Software, NC) to obtain clearance values.

Representative Analytical: Rat plasma is extracted with an equal volume of acetonitrile (containing 0.1% TFA). Samples are then centrifuged at approximately 1,000 x g and the supernatant analyzed by gradient HPLC. A typical assay procedure is described below.

200 pL of plasma is precipitated with 200 pL of 0.1% trifluoroacetic acid (TFA) in acetonitrile and 10 gL of a 50% aqueous zinc chloride solution, vortexed then centrifuged at ~1000 x g and the supernatant collected and analyzed by HPLC.

HPLC procedure: Column: Column temperature: Flow rate: Injection volume: Mobile phase: acetonitrile Gradient employed: Zorbax SB-CN (4.6 x 150 mm) particle size) 50 °C 1.0 mL/min 75 yL.

A=0.1% TFA in water and B=100% 100% A to 30% A in 15.5 min 0% A at 16 min 100% A at 19.2 min 214 .nm Wavelength: 267 A standard curve is run at 20, 10, 5, 2 and 1 pg/mL concentrations.

Table 7. Clearance Data Example Rat I.V. Clearance (ml/min/kg) 7d A 7f B

B

A

C

122b B 122c C 122d B 122f A Bioavailabilitv Oral pharmacokinetic studies Male Sprague-Dawley rats (Harlan, Indianapolis, IN, 300-350 g) were anesthetized by an intramuscular injection of ketamine/rompun mixture. A PE-50 cannula was inserted in the right carotid artery for arterial blood sampling. The rats were allowed to recover from surgery overnight (216 hours) prior to being used in the study. Test compounds were administered orally in 25% Cremophor EL/water or 100% propylene glycol (PG) in a dose volume of 10 mL/kg. Blood samples (~0.30 mL) were removed at 0.25, 0.50, 1.0, 1.5, 2, 3, 4, 6, and 8 hours post-dose, plasma separated by centrifugation and stored at -20°C pending analysis.

Quantitation of the plasma samples was conducted using a gradient HPLC/MS/MS or enzymatic method detailed below: 268 HPLC/MS/MS Method, for the quantitation of ICE inhibitors in rat plasma Sample Preparation s 504~ of plasma are aliquotted into Eppendorf S centrifuge vials.

An equal volume of Acetonitrile is added to theplasma to precipitate plasma proteins.

Samples are vortexed for 5 minutes, and centrifuged at 14,000 rpms for 5 minutes.

.7541 of the supernatant is loaded.into 12mm HPLC liquid sampler vials.

S5041 of sample is injected for analysis via the mass spectrometer.

HPLC Instrumental Parameters HPLC: Hewlett Packard HPI100 Binary Solvent Delivery System.

HPLC Gradient Conditions A H 2 0 0.2% Formic Acid B Acetonitrile 0.2V Formic Acid Mobile Phase Time %A %B 0 100 0 2 100 0 0 100 11 0 100 11.5 100 0 17 100 0 HPLC Analytical Column: Keystone Phenyl -2 Hypersil 2.Dx100mm, 5p 120A pore size, P/N 105-39-2 I 269 Injection Volume; 501I Flow Rate: 0.20 mL/min.

Mass Spectrometry Instrumental Parameters Instrument: P E Sciex API-365 Tandem Mass Spectrometer Ionization Technique: Turbo-Ionspray (ESI) Polarity: Eositive Dwell Time: 300msec Pause Time: Scan time: 0.9sec Scan Mode: KRM (Multiple Reaction Monitoring) ICE ENZZYKTIC ASSAY FOR TEE QUANTITATION OF ICE INRIBITORS IN RAT PLASMA So L of plasma was extracted with 150 pL acetonitrile, sonicated, vortexed, centrifuged at 10,000xg and 180 pL of the supernatant dried in a Sorvall vortex evaporator at room temperature. Samples were reconstituted in 100 AL buffer (10 mM tris-HC1, pH 7.5 with 0.1% CHAPS.

1 mM DTT) with sonication. 10 AL of each sample was mixed with 10 L ICE (1.1 mg/mL) in a microritre plate with 60 pL buffer. Samples were incubated for 15 min.

at room temperature then 20 pL Succ YVAJ-pNA (400 pM, prewarmed to 37c) added, and the plate monitored at 405 nm for 20 min- at 370C used a SpectraMax reader.

The data were fitted using a 4 parameter fir with the SpectraMax software using an extracted standard curve.

The assay was linear from 0.15 to 2.0-3.0 pg/mL aldehyde.

270 Pharmacokinetic Parameters Pharmacokinetic analysis of these plasma concentration data was conducted using noncompartmental methods. The area under the curve (AUC(o-t)) was estimated from time zero to the last measured time point using the linear trapezoidal rule. The rate of elimination (ke) was estimated by log-linear regression from the terminal phase of the plasma concentration-time curves. Area under the tail of the curve was estimated as the ratio of the last measured concentration to ke. The area under the curve from time zero to infinity (AUC(O-oo)) was obtained by addition of the area under the tail to AUC(0-t). Elimination half-life was estimated as 0.693/ke. The observed values for the peak plasma concentration (Cmax) were recorded. For prodrug studies: aldehyde availability (bioavailability) was calculated as: (AUCald/prodrug (AUCald/ald x (dose aid, ald i.v./dose prodrug, prodrug p.o.) x (MW prodrug/MW aldehyde).

Table 8. Bioavailability Data Example Cmax AUC t 1/2 (hrs) F (pgXh/mL) 56 A B A A B C C A C A B B A 68 A C B 76 C C C 77 B B A A 78 A A B A B C C 83 A C C 271- Antiviral Assays The efficacy of the compounds of this invention at treating or preventing antiviral related diseases, disorders, or conditions may be evaluated in various in vitro and in vivo assays. For example, assays may be preformed to determine the ability of these compounds to inhibit inflammatory responses associated with viral infections. In vitro assays may i0 employ whole cells or isolated cellular components. In vivo assays include animal models for viral diseases.

272 Examples of such animal models include, but are not limited to, rodent models for HBV or HCV infection, the Woodchuck model for EBV infection, and chimpanzee model for HCV infection.

Compounds of this invention may also be evaluated in animal models for dietary alcohol-induced disease.

Other assays that may be used to evaluate the compounds of this invention are disclosed in PCT application PCT/US96/20843, published June 26, 1997, under publication no. WO 97/22619. Such assays include in vivo pharmacokinetic studies in the mouse, inhibition of ICE homologs, inhibition of apoptosis, in vivo acute assay for anti-inflammatory efficacy, measurement of blood levels of drugs, IGIF assays, mouse carrageenan peritoneal inflammation assay, and type II collagen-induced arthritis.

Insofar as the compounds of this invention are able to inhibit caspases, particularly ICE, in vitro and furthermore, may be delivered orally to mammals, they are of evident clinical utility for the treatment of IL-1-, apoptosis-, IGIF-, and IFN-ymediated diseases.

While we have described a number of embodiments of this invention, it is apparent that our basic constructions may be altered to provide other embodiments which utilize the products and processes of this invention.

Claims (24)

1. A compound represented by iformnula 1: 0 R5 R N R6 wherein: Y is.: provided that when R 7 is -OH then Y can a'lso be: (b) 0 HO H X is -CUR 3 2 Or m La 0 or 1;. S RS, -S Ni (H) RI is H, -R 8 -C(O)R 8 -C(O))C(O)R 8 -S(O))2R 8 -C(0)0CR 8 -C(0)N(Hj)R 8 8 C(0) N(H) R 8 -c CH=CHR 8 274 -C(0)CH 2 0R 8 -C(O)CH 2 N(H)R 8 -C(0)N(R 8 2 -S(0)2N(R 8 2 -C(O)C(0)N(R 8 -C(O)CH2N(RS)2, -CH 2 R 8 -CH 2 -alkenyl-R 8 or -CH 2 -alkynyl-R 8 R 2 is -H and each R 3 is independently an amino acid side chain, -R 8 alkenyl-R 9 or alkynyl-R 9 or each R3, together with the atom to which they are bound, form a 3 to 7 membered cyclic or heterocyclic cyclic ring system, or R2 and one R 3 together with the atoms to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R 1 1 a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -R 1 R 4 is -H and each R 5 is independently an amino acid side chain, -R 8 -alkenyl-R 9 or -alkynyl- R 9 or R 4 and one R 5 together with the atoms to which they are bound form a ring system selected from: r N- Ri N (CH2)n N I S N 275 N N N or wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1 or R 4 and one R together with the atoms to which they are bound form a ring system: R 6 is -H; R7 is -OH, -OR 8 or -N(H)OH; each R 8 is independently -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl 276 -alkylaryl, -alkyiheteroaryl, or -alkylheterocyClyl, wherein a hydrogen atom bound to any -alkyl. or -cycloalkyl carbon atom is optionally replaced by RIG, a hydrogen atom bound to any -aryl or -heteroary- carbon atom is optionally replaced by R1 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 each R, 9 is independently -aryl, -heteroaryl, cycloalky-, or -heterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by RIO, a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by each RIO is independently -CH, -58, -Cl, -Br, -N02, -CN, -N8H2, -CO2H, -C(O)NH2, -N(H)CCO)H, -N(H)C(O)NH2, -perfluoroalkyl, -O-alkyl, -0-aryl, -0-alkylaryl, -NCHi)alkyl, -N(H)aryl, -N(H)-alkylaryl, -N(alkyl)2, -C(O)N(HT)alkyl, -C(O)N(alkyl)2, -N C(C)alkyl, -N U) C D) Qalkyl, C aryl, -NiH) C(COalkylaryl, -N(I-UC(0) Obeteroaryl, -N C(0) Qalkylbeteroaryl, -N C (0)Ocycloalcyl, -N()C(0)N(H)alkyl, -N(I-)C(0)N(alkYl)2, -N(H)C(0)N(H)aryl, -N(H)C(0)N(H)alkylaryl, -NUO)C(0)N(H)het-eroaryl, -N(HI)C(O)N(Ha2kylheteroaryl, -N(H)C(O)NCH)cycolalkyl. -S-alky-, -S-aryl, -CH4 2 NH2, -CFi 2 N(H)alkyl, or -CH 2 N(alkyl)2, -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcyclo&2-kyl -alkylaryl, -alkylheteroaryl, or -alkylb-eterocyclyl1 wherein a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally 277 replaced by R 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R1; and each R 11 is independently -OH, -SN, -Cl, -Br, -N02, -CN, -NH2, -C02.t' -C(O)NE-2, -N(H)C(O)H, -N(H)C(0))N42, -al.kyl, -cycloalkyl, -pertluoroalkyl, -0- alkyl, -0-aryl, -0-alkylaryl, -N(H)alkyl, -N(H)aryl, -N -alk-ylaryl, -N (alkyl) 2, -C (GIN (H-)alkyl, -C0)N(alkyl)2, -N(H)C(0)alkyl, -N(H)C(0)N(H)alkyl, -S(0)2alkyl, -S(Olalkyl-, -COlalkyl, -CH2NE2, -CH 2 N(H)alkyl, or -CH 2 N(alkyl)2.

2. A compound represented by formula 1: 0 R5 R R1xN NVN Y Y is- C OR, 0 OR 8 mn in m R 8 0 H 'Re ,r H 0 R H- OR 8 OR 12 R Cc) Ce)(f provided that when R 6 is not hydrogen, R 6 and Y, together with the nitrogen to which they are bound, a ring 278 N A R 13 R 13 (g) X is -C(R 3 or -N(R3)- m is 0 or 1; R 1 is H, -R8, -C(O)R 8 -C(O)C(0)R 8 -S(0)2R 8 -S(0)R 8 -C(O)OR 8 2(H)-R, -S(o)N(H)-R 8 -C(0)C(0)N(H)R 8 -C(0)CH-CHR 8 -C()CH2 -C(CHN(H)R-C(O)CHR C( N(H)R, -C(O)N(R) 2 -S(0)2N(R 8 2 -S(0)N(R 8 2 -C(O)C(0)N(R 8 -C(O)CH2N(R 8 -CH 2 RB, -CH 2 -alkenyl-R 8 or -CH 2 -alkynyl-R 8 R 2 is -H and each R 3 is independently an amino acid side chain, -Rs, alkenyl-R 9 or alkynyl-R 9 or each R 3 together with the atom to which they are bound, form a 3 to 7 membered cyclic or heterocyclic cyclic ring system, or R 2 and one R 3 together with the atoms to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R 1 0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R 11 a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -R 1 279 R 4 is -H and each R 5 is independently an amino acid side chain, -R 8 -alkenyl-R 9 or -alkynyl-R 9 or R 4 and one R 5 together with the atoms to which they are bound form a ring system selected from: N N N I NN N N R N 0 N N N I I o N N N ,or wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1 or R 4 and one R 280 together with the atoms to which they are bound form a ring system: RE is -H; each R 8 is independently -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 each R 9 is independently -aryl, -heteroaryl, cycloalkyl, or -heterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 1 0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 1 1 and a hydrogen atom bound to any nitrogen atom is optionally replaced by RI; each R0 is independently -OH, -SH, -C1, -Br, -NO2, -CN, -NH2, -CO2H, -C(O)NR2, -N(H)C(O)H, -N(H)C(O)NH2, -perfluoroalkyl, -O-alkyl, -O-aryl, -O-alkylaryl, -N(H)alkyl, -N(H)aryl, -N(H)-alkylaryl, -N(alkyl)2, -C(O)N(H)alkyl, -C(O)N(alkyl)2, -N(NH)C(0)alkyl, -N(H)C(O)Oalkyl, -N(H)C(0)Oary1, -N(H)C(O)Oalkylaryl, -N(H)C(0)Oheteroaryl, 281 -N(H C(O)Oalkylheueroaryl, -N(H)c Ocycloalkyl, -N(H)C(O)NN)aJ.kyl, -N(R)cco)N(alkya) 2 -N(H)C(O)N(ni)an-yl NX(E)C(0)N(N4)aakyaaryl, NY(Y)C(0)N(H)heteroaryl, -N(H)C(o)Ncu)alky:?heteroar, 43 (F)C()N(H)cycloalkeyl1 -S-alkyl, -S-aryl,- -S(0) 2 alkyl, -S(C)alkyl, -C(0)alkyl, -CU2NH2, -CK2N(M)alkya, or -CH2N(alkyl) 2 -al~kyl, -cycloalkyl, -aryl, -heteroaryi, -heterocyciya, -alkylcvcaoamkyl -alkylaryl, -alkylbeteroaryl, or -alkylheterocyclya, wherein a hydrogen atom bound to any -aryl or -heteroaryi carbon atom is optionally replaced by R 1 I and a hydrogen atom bound to any nitrogen atom is optionally replaced by R 1 and is each R 11 is independently -SR, -Cl, -N(U)C(Q)N8 2 -alkyl, -cycloalkyl, -pertJluoroalkyl, -C- alkyl, -0-aryl, -O-alkylaryl, -N(N)alkyl, -N(E)aryl, -alkylaryl, -N(,alkya) 2 -C(o)N(N)alkyl, -C(Q)N(alkyl) 2, C(0)alkya 1 -N(.%)c(0)NCH)alkyl, -N(H)C(O)N(alkyl) 2 -S-alkyl, -S-aryl, -S-alkylaryl, -S(0)2alkyl1, -S(0)alkcyl, -CC0)alkyl1, -C1{2NHi2, -CH2N(H)alkyl1, or, -CH2N(alkyl) 2 R1 2 is -C(0)a:lkyl, -C(O)cycloalkya, -C(O)alkyenyl, alkyla-y:l, -C(O),alkylheteroaryl, -C(0)heterocyclyi, or -C(O))alkyahererocyclyl; and R 1 3 is -alkyl, -aryl, -alkylaryl or -alkylheteroaryl.

3. A compound re-presented by formula I: 282 NN.V 0 wherein.. Y is.- (a)m H 0 or y0 0 HO H m is 0ori1; X is -C 3 2 -S R8, 1 is M4, -R 8 -C (O R 2 nCOaO R 8 S O 2 6 -'CO R 8 -C(CO R 8 -C CO)N CH)Ra, -S O 2 -s -K 8 -C (O)C(Q)NCN)Ri 8 8 -CCOYCEi 2 oR8, -CCO)CH' 2 N(H)RS, -CCO)NCRS) 2 -S(O)2u(RS8) 2 -S N(R 8 2 -CCO)C(0)N(p.E) 2 Cl12N(R8) 2' -CH 2 R 8 -CI-2-alkenyl-RS, Or -CH2-alkynylNR8 1 283 -R 2 is -H and each R 3 is independently an amino acid side chain, -RS, alkenyl-R 9 or alkynyl-RS, or each R 3 together with the atom to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R11, a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -RI; R 4 is -H and each R S is independently an amino acid side chain, -R 8 -alkenyl-RS, or -alkynyl-R9, or R4 and one R 5 together with the atoms to which they are bound form a ring system selected from: rN NI RN N (CH 2 )n 0 N N 284 /N N N rhi or N O wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 10 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R II and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1 or R 4 and one together with the atoms to which they are bound form a ring system: SN R 6 is -H; R 7 is -OH, -OR 8 -N(H)OH, or -N(H)S(0) 2 R8; each R 8 is independently -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 1 0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a 285 hydrogen atom bound to any nitrogen atom is optionally replaced by RI; each R 9 is independently -aryl, -heteroaryi, cycloalkyl, or -heterocyciya, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by RIO, a hydrogen atom bound to any -aryl or -heteroaryl. carbon atom is optionally replaced by H 1 I, and a hydrogen atom hound to any nitrogen atomr is optionally replaced by Rs-; each RIO is independently -OH, -C1, -Br, -N02, -ON, -NT! 2 -C021, -C(O)NT{2, -NWH)C(o)H, C(O)NN-2, -perfluoroalkyl, -0-alkyl, -0-aryl, is -0-alkylaryl, -N(H--)alkyi, -N(H)aryl, -N(HY,-alkylaryl, -N CCC)alkyl, -N C(0) Qalkyl, -N C(0) Qaryl, -N Qalkylaryl, -N CCC) Oheteroaryl, -N C (C)Oaikylheteroaryl, -N C (0)Ocycloalkyl, -()C)jaky,-N(T-nc(cD)N~alkylJ 2 N(H)C(C)N()aryi, -N(H4)CC)N(H)alkyaaryl, -N CCC)N heteroaryl, -N (H)C (C)N (U)alkylheteroaxyi, -N (HT) CC) N(H) cyoloalkyl, -S-alkyl, -S-aryl, -S-alkylaryl, -S(0)2alkya, -SCO)alkyl, -C(0)alkyl, -CH2NM 2 -CH2N(H)alky2, Or -CH2N(aikyl) 2 -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocycayl, -alkylcvcloalky. -alkylaryl, -alkyiheteroaryl, or -alkylheterccyclyi, wherein a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by and each R 11 is independently -01I, -Cl, -Br, -N02, -ON, -NH2, -C0211, -CCC)NH2, -N(14)C(o)H-, 286 -wa)c(o)N{ 2 -alkyl, -Cycicalkyl, -Perfi-uorosakyl, -0- alkyl, -0)-aryl, -O-alkylaryi, -N(E)alkyl, -N(14)aryl, -alkylaryl, -N (alkyl) 2, -C (0)N M) alkyl, -CCO)N(alkyl) 2 -NCH)C()alkyl, -N(H)C(Q)N(H)alky1, S -N(H)C(OJN(alkyl) 2 -S-alkya, -S-aryl, -S-alkylaryi, -S(o))2alkyl, -S(0)aJlkyl, -C(O)aJlkyl, -CE2NH2, -CH2N(-)alky. or -C}2N(alkYl) 2 .R 3 is not provided-that if one R 3 is-H -Ii.

4. A compound represented by R 5 RS p2S R1-- N N- then the other f ormul a I: wherein: Y is: o ORB H OR 8 (d) o OR 8 Or OR 12 (e) m is 0 or 1; X is -C(R 3 2 287 R 1 is H, -R 8 -C(O)R 8 -C(O)C(O)R 8 -S(0)2R 8 -S(O)R 8 -C(0)0RS, -C(O)N(H)RS, -S(0) 2 N(H)-R 8 -C(O)C(O)N(H)R 8 -C(O)C=CHRS, -C(0)CH 2 N(H)Re, -C(O)N(RS) 2 -S(0)2N(R 8 2 -S(o)N(R 8 2 -C{O)C(0)N(R 8 2 -C(O)C2N(R 8 2 -CH 2 RB, -CH 2 -alkenyl-RS, or -CH2-alkynyl-R8 R 2 is -H and each R 3 is independently an amino acid side chain, alkenyl-R 9 or alkynyl-R 9 or each R 3 together with the atom to which they are bound, form a 3 to 7 membered cyclic or heterocyclic ring system, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by -R I0 a hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by -R 11 a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced by -RI; R 4 is -H and each R 5 is independently an amino acid side chain, -R 8 -alkenyl-R 9 or -alkynyl-R 9 or R 4 and one R5 together with the atoms to which they are bound form a ring system selected from: N RN N NN 288 -Y N N N N N a hydroge n atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom of the ring system is optionally replaced with R 1 or R 4 and one together with the atoms to which they are bound form a ring system: AN R 6 is -H; each R 8 is independently -alkyl, -cycloalkyl, -aryl, -heteroaryl, -heterocyclyl, -alkylcycloalkyl -alkylaryl, -alkylheteroaryl, or -alkylheterocyclyl, wherein a hydrogen atom bound to any -alkyl or 289 -cycloalkyl carbon atom is optionally replaced by R 10 O, a -hydrogen atom bound to any -aryl or -heteroaryl carbon atom is optionally replaced by R 11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R1; each R 9 is independently -aryl, -heteroaryi, cycloalkyl, or -heterocyciya, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by RIO, a hydrogen atom bound to any -aryl or -heeeroary. carbon atom is optionally replaced by H 11 and a hydrogen atom bound to any nitrogen acorn is optionally replaced by H 1 I; each RIO is independently -OHi, -SH, -Cl, -NO 2 -CN, -NH 2 -CO214, -C(o)NTH 2 -N(H)C()NH 2 -perffluoroalkyl, -0-alkyl, -0-aryl, -O-alkyla-ya, alkyl, -N aryl, -N -alkylaryl, -N~alkYl) 2 -C(O)N(H)alkyl, -C(O)N".(alkYl) 2 -N C(0) alkyl, -N CX) CC) Calkyl1, CCC) Gary., CCC) alkylaryl, -N C (C)Cheteroar-yl, -N(H)C()0alky1heter.oaryj, -N(H)cCO) Ocycloalkyl, N(M)CC)N(H)aikyl, -N(H)C(O)Nalkyl) 2 -NR) CCC) N CR)aryl, -N 0(0) N (H)alkylary1, -N C(0) N M) heteroary1, -N C C) N(H) alkylbet-eroarYl, -N(H)C(0)NCH)cyclcalkyl, -S-alkyl, -S-aryl, -8-alkylaryl, -S(C)2alkyl, -SCC)alkyl, -C(O)alkyl, -CH2N-q2, -CH2N\(Wi)alkyl, or -CH2N~alkyl) 2 -alkcyl, -cycloalkyl, -aryl,.-heteroar:yi -hecerocycnayi, -alkylcycloalkyl -alkylaryx, -alkcylhetercaxyl, or -alkylbeterocyclyl, wherein a hydrogen atom bound to any -aryl or -heteroaryi carbon atom is optionally replaced by R11 and a hydrogen atom bound to any nitrogen atom is optionally replaced by R1; and 290 each R 11 is independently -OH, -SH, -Cl, -Br, -1t, -N02, -CN, -NH2, -C02H, -C(O)U82, -N(HI)C(O)H, -N(H-)C(O)NH2, -alkyl, -cycloalkyl, -perfluoro&1ky1, -0- alkyl, -0-aryl, -0-alkylaryl, -NCH)alkyl, -N(H4)aryl, -N(H)-alkylaryl, -N(alkyl)2, -C(O)NCH)alkyl, -C(0)N(alkyJJ2, -N(F.)C(O)alkyl, -N(H)C(O)N(H)alkyl, -N(H)C(O)N(alkyl)2, -S-alkyL, -S-aryl, -S-alkylaryl, -SCO)2alkyl, -S(Q)alkyl, -C(0)alkyl, -CH2NX2, -CH2N(H)alkyl, or -CH2N(alkyl)2; and R 12 is -CCO)alkyl, -C(O)cycloalkyl, -C(O)alkyenlyl, -C(0)alkylaryl, -C(0)alkylheterOarYl, -C (0)heterocyclyl, or -C (0)alkylheterocyclyl. The compound according to claim 2 or claim 4 wherein Y is: 200 0 4H and V is: CH 3 O, Q- 0- 00 0 H N H 9d o NJo 0,0 0 t4,". 0o o 0i12 Tsr 292 O O N N o O- N '0 0 HN-1 No Sor °OO NO /N N

6. The compound according to any one of claims 1-5 wherein R 4 and one R 5 together with the atoms to which they are bound form a ring system selected from: N N N\ N- 293 N N N S, or wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 1 0 or R 4 and one R 5 together with the atoms to which they are bound form a ring system:

7. The compound according to claim 6 wherein one R 3 is -H and the other R 3 is methyl, isopropyl, tert-butyl, -CH,S R 8 -CHSO2R 8 -CHCHSR 8 or -CH,CH 2 SOR 8

8. The compound according to claim 7 wherein one R 3 is -H and the other R 3 is methyl.

9. The compound according to claim 8 wherein R 1 is -C(O)R 8 or -C(O)C(O)R 8 294 The compound according to claim 6 wherein R 4 and one R 5 together with the atoms to which they are bound form a ring system selected from: N R, R N I I N (CH 2 )n N-N N N and the other R 5 is H, wherein a hydrogen atom bound to any -alkyl or -cycloalkyl carbon atom is optionally replaced by R 1 0

11. The compound according to claim wherein one R 3 is -H and the other R 3 is methyl, isopropyl, tert-butyl, -CH 2 SR 8 -CFSOR 8 -CH 2 CH 2 SR 8 or -CH 2 CH,SOR 8

12. The compound according to claim 11 wherein one R 3 is -H and the other R 3 is methyl. 295

13. The compound according to claim 12 wherein R 1 is -C(O)R 8 or -C(O)C(O)R 8

14. The compound according to claim 6 wherein one R 4 and one R 5 together with the atoms to which they are bound form a ring system: and the other R 5 is H. and the other R 5 is H. The compound according to wherein one R 3 is -H and the other R 3 is isopropyl, tert-butyl, -CH 2 SR 8 -CH 2 SOR 8 -CH,CH,SO,R 8 claim 14 methyl, -CH,CH 2 ,SR, or

16. The compound according to claim wherein one R 3 is -H and the other R 3 is methyl.

17. The compound according to claim 16 wherein R 1 is -C(O)R 8 or -C(O)C()R 8

18. The compound according to claim 1 or claim 3 selected from the group consisting of: 7a-7at, 20a-20t, 23a-23i, 24a-24e, 26d, 26e, 29a-29s, 32a-e, 34, 42, 46, 52, 57, 61, 65, 69, 73, 121, and 122a-v.

19. The compound according to claim 4 selected from the group consisting of: 41, 45, 51, 56, 64, 68, 72, 76-93, 98a-z, 98aa-az, 98ba and 98bb, 101, 102a, 102b, 108a-108d, 110, 111, 116a-116h, and 120a, and 120b. 296 A compound selected from the group consisting of: 37, 38, 39, 43, 44, 49, 50, 54, 55, 58, 59, 67, 71, 75, 96a-96c, 97a-97c, 100, 106, 107, 109, i15a-115c, 120a, 120b, 67b H2c? o o O OH F 115d 0 CH 3 H 2 N 0 OH Cl F CH3 N 0 c N o 0 OH and C 11 5 f H3C0'o CH F H 3 CN' 0 0 OH Ci

21. A pharmaceutical composition comprising: a) a compound according to any one of claims 1-19; and b) a pharmaceutically acceptable carrier, adjuvant or vehicle. 297

22. A method for treating or preventing a disease selected from an IL- mediated disease, an apoptosis mediated disease, an inflammatory disease, an autoimmune disease, a destructive bone disorder, a proliferative disorder, an infectious disease, a degenerative disease, a necrotic disease, an excess dietary alcohol intake disease, a viral mediated disease, inflammatory peritonitis, osteoarthritis, pancreatitis, asthma, adult respiratory distress syndrome, glomerulonephritis, rheumatoid arthritis, systemic lupus erythematosus, scleroderma, chronic thyroiditis, Grave's disease, autoimmune gastritis, insulin-dependent diabetes mellitus (Type I), autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopenia, chronic active hepatitis, myasthenia gravis, inflammatory bowel disease, Crohn's disease, psoriasis, atopic dermatitis, graft vs host disease, osteoporcsis, leukemias and related disorders, myelodysplastic syndrome, multiple myeloma-related bone disorder, acute myelogenous leukemia, chronic myelogenous leukemia, metastatic melanoma, Kaposi's sarcoma, multiple myeloma, sepsis, septic shock, Shigellosis, Alzheimer's disease, Parkinson's disease, cerebral ischemia, myocardial ischemia, spinal muscular atrophy, multiple sclerosis, AIDS-related encephalitis, HIV-related encephalitis, aging, alopecia, neurological damage due to stroke, ulcerative colitis, traumatic brain injury, organ transplant rejection, hepatitis-B, hepatitis-C, hepatitis-G, yellow fever, dengue fever, or Japanese encephalitis, in a patient comprising the step of administering to said patient a compound according to any one of claims 1-19 or a pharmaceutical composition according to claim 21. 298

23. The method according to claim 22, wherein the disease is rheumatoid arthritis, inflammatory bowel disease, Crohn's disease, ulcerative colitis, inflammatory peritonitis, septic shock, pancreatitis, traumatic brain injury, organ transplant rejection, osteoarthritis, asthma, psoriasis, Alzheimer's disease, atopic dermatitis,- leukemias and related disorders, myelodysplastic syndrome, or multiple myeloma.

24. A method for inhibiting an ICE-mediated function in a patient comprising the step of administering to said patient a compound according to any one of claims 1-19 or a pharmaceutical composition according to claim 21. A method for decreasing IGIF or IFN-y production in a patient comprising the step of administering to said patient a compound according to any one of claims 1-19 or a pharmaceutical composition according to claim 21.

26. The use of a compound according to any one of claims 1-19 or a pharmaceutical composition according to claim 21 in the manufacture of a medicament for treating or preventing a disease selected from an IL-1 mediated disease, an apoptosis mediated disease, an inflammatory disease, an autoimmune disease, a destructive bone disorder, a proliferative disorder, an infectious disease, a degenerative disease, a necrotic disease, an excess dietary alcohol intake disease, a viral mediated disease, inflammatory peritonitis, osteoarthritis, pancreatitis, asthma, adult respiratory distress -299 syndrome, glomerulonephritis, rheumatoid arthritis, systemic lupus erythematosus, scleroderma, chronic thyroiditis, Grave's disease, autoimmune gastritis, insulin-dependent diabetes mellitus (Type I), autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopenia, chronic active hepatitis, myasthenia gravis, inflammatory bowel disease, Crohn's disease, psoriasis, atopic dermatitis, graft vs host disease, osteoporosis, leukemias and related disorders, myelodysplastic syndrome, multiple myeloma-related bone disorder, acute myelogenous leukemia, chronic myelogenous leukemia, metastatic melanoma, Kaposi's sarcoma, multiple myeloma, sepsis, septic shock, Shigellosis, Alzheimer's disease, Parkinson's disease, cerebral ischemia, myocardial ischemia, spinal muscular atrophy, multiple sclerosis, AIDS-related encephalitis, HIV-related encephalitis, aging, alopecia, neurological damage due to stroke, ulcerative colitis, traumatic brain injury, organ transplant rejection, hepatitis-B, hepatitis-C, hepatitis-G, yellow fever, dengue fever, or Japanese encephalitis, in a patient.

27. The use according to claim 26, wherein the disease is rheumatoid arthritis, inflammatory bowel disease, Crohn's disease, ulcerative colitis, inflammatory peritonitis, septic shock, pancreatitis, traumatic brain injury, organ transplant rejection, osteoarthritis, asthma, psoriasis, Alzheimer's disease, atopic dermatitis, leukemias and related disorders, myelodysplastic syndrome, or multiple myeloma.

28. The use of a compound according to any one of claims 1-19 or a pharmaceutical composition according to claim 21 in the manufacture of a I 1 I I 300 medicament for inhibiting an ICE-mediated function in a patient.

29. The use of a compound according to any one of claims.1-19 or a.pharmaceutical composition according to claim 21 in the manufacture of a medicament for decreasing IGIF or IFN-y production in a patient. DATED this 2 2 nd day of October 2003 VERTEX PHARMACEUTICALS INCORPORATED By their Patent Attorneys _CULLEN CO.